Owners have filed 69 complaints
about the 2018 Mercedes Benz GLA 250 with NHTSA between 2017 and 2026.
The largest single group is the engine & cooling.
Across this model's run it ranks 2 of 8 worst.
The letter says how bad. This says what kind — whether this year drew
an unusual number of complaints, unusually dangerous
ones, or failures that arrived unusually early.
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 65
Against the median year of the Mercedes Benz GLA 250. 50 means typical for this
model; 100 means roughly double.
Severity — 60
11.6% of these complaints
involved a crash, fire, injury or death, against a national rate of
9.7%.
Early failure — 82
48% of failures with a mileage on record happened under
36,000 miles, against a national rate of
29%.
How 2018 compares with every other Mercedes Benz GLA 250
Odometer readings owners gave when they filed. About half of all
complaints include one.
Under 1,000 miles
313.0%
1,000 – 9,999 miles
417.4%
10,000 – 24,999 miles
313.0%
25,000 – 49,999 miles
730.4%
50,000 – 74,999 miles
313.0%
75,000 – 99,999 miles
14.3%
100,000 – 149,999 miles
14.3%
150,000+ miles
14.3%
When owners complained
A spike years after the car went on sale usually means a part wearing
out on schedule across the whole fleet — the kind of pattern no single
owner can see from inside their own car.
Oct 2017peak 5Jul 2026
NHTSA investigations into the 2018 Mercedes Benz GLA 250
An investigation is the step before a recall: the agency has seen enough
complaints to look into a pattern itself. An open one means it thinks
something may be wrong and nothing has been fixed yet.
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.C...
Complaints that involved harm
Reports where the owner recorded a crash, a fire, an injury or a death.
at 95,000 milesInglewood, CACrash
WHEELS
TL* THE CONTACT OWNS A 2018 MERCEDES-BENZ GLA250 EQUIPPED WITH BRIDGESTONE DUELER H/L 400 TIRES, SIZE: 235/50R18 (NA). WHILE DRIVING 30-35 MPH, CHUNKS OF TREAD STARTED TO SEPARATE FROM THE TIRES WITHOUT WARNING. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE. THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. CARMAX (8611 S LA CIENEGA BLVD, INGLEWOOD, CA 90301, (310) 568-9272) WAS INFORMED, BUT UNABLE TO ASSIST. THE MANUFACTURER WAS NOTIFIED. THE VEHICLE FAILURE MILEAGE WAS 10,580. THE TIRE FAILURE MILEAGE WAS UNKNOWN. *BF
NHTSA complaint #11208088 — an unverified report by a vehicle owner.
at 2,256 milesTulsa, OKCrash1 injured
WHEELS
YOU WOULD ALWAYS NEED TO THINK AND SEARCH WHERE YOU ARE GOING TO INVEST YOUR MONEY REGARDLESS OF CAR BRAND NAME... YES, NON OF THE (8) AIRBAGS EQUIPPED IN MY BRAND NEW 2018 CAR, AS CLAIMED BY MERCEDES BENZ (DISTRIBUTED IN VARIOUS LOCATIONS WITHIN THE CAR), ALONG WITH THE MODERN SOPHISTICATED SAFETY TECHNOLOGY AS CLAIMED, HAS BEEN ACTIVATED/DEPLOYED DURING THAT CAR ACCIDENT TO PREVENT SEVERE PAIN FOR MY WIFE WHO WAS RUSHED THAT DAY TO A HOSPITAL FOR INTENSIVE MEDICAL CARE. AFTER THEIR ENGINEERING CREW INVESTIGATIONS, MB USA COMPANY PROVIDES RIDICULOUS AND UNPROFESSIONAL EXPLANATIONS ON WHY AIRBAGS WHERE NOT ACTIVATED/DEPLOYED DURING THE ACCIDENT, WHICH WAS ALMOST ABOUT CAUSING THE CAR TO BE FLIPPED OVER. I'M LEFT NOW FOR PAYING SOAR MEDICAL EXPENSES AND CAR REPAIR COST.
NHTSA complaint #11155898 — an unverified report by a vehicle owner.
at 2,256 milesTulsa, OKCrash1 injured
SUSPENSION
YOU WOULD ALWAYS NEED TO THINK AND SEARCH WHERE YOU ARE GOING TO INVEST YOUR MONEY REGARDLESS OF CAR BRAND NAME... YES, NON OF THE (8) AIRBAGS EQUIPPED IN MY BRAND NEW 2018 CAR, AS CLAIMED BY MERCEDES BENZ (DISTRIBUTED IN VARIOUS LOCATIONS WITHIN THE CAR), ALONG WITH THE MODERN SOPHISTICATED SAFETY TECHNOLOGY AS CLAIMED, HAS BEEN ACTIVATED/DEPLOYED DURING THAT CAR ACCIDENT TO PREVENT SEVERE PAIN FOR MY WIFE WHO WAS RUSHED THAT DAY TO A HOSPITAL FOR INTENSIVE MEDICAL CARE. AFTER THEIR ENGINEERING CREW INVESTIGATIONS, MB USA COMPANY PROVIDES RIDICULOUS AND UNPROFESSIONAL EXPLANATIONS ON WHY AIRBAGS WHERE NOT ACTIVATED/DEPLOYED DURING THE ACCIDENT, WHICH WAS ALMOST ABOUT CAUSING THE CAR TO BE FLIPPED OVER. I'M LEFT NOW FOR PAYING SOAR MEDICAL EXPENSES AND CAR REPAIR COST.
NHTSA complaint #11155898 — an unverified report by a vehicle owner.
at 2,256 milesTulsa, OKCrash1 injured
STRUCTURE:BODY
YOU WOULD ALWAYS NEED TO THINK AND SEARCH WHERE YOU ARE GOING TO INVEST YOUR MONEY REGARDLESS OF CAR BRAND NAME... YES, NON OF THE (8) AIRBAGS EQUIPPED IN MY BRAND NEW 2018 CAR, AS CLAIMED BY MERCEDES BENZ (DISTRIBUTED IN VARIOUS LOCATIONS WITHIN THE CAR), ALONG WITH THE MODERN SOPHISTICATED SAFETY TECHNOLOGY AS CLAIMED, HAS BEEN ACTIVATED/DEPLOYED DURING THAT CAR ACCIDENT TO PREVENT SEVERE PAIN FOR MY WIFE WHO WAS RUSHED THAT DAY TO A HOSPITAL FOR INTENSIVE MEDICAL CARE. AFTER THEIR ENGINEERING CREW INVESTIGATIONS, MB USA COMPANY PROVIDES RIDICULOUS AND UNPROFESSIONAL EXPLANATIONS ON WHY AIRBAGS WHERE NOT ACTIVATED/DEPLOYED DURING THE ACCIDENT, WHICH WAS ALMOST ABOUT CAUSING THE CAR TO BE FLIPPED OVER. I'M LEFT NOW FOR PAYING SOAR MEDICAL EXPENSES AND CAR REPAIR COST.
NHTSA complaint #11155898 — an unverified report by a vehicle owner.
at 11,100 milesBoca Raton, FLFire
ELECTRICAL SYSTEM
AT 1:10 AM THE 2018 MERCEDES BENZ GLA SPONTANEOUSLY CAUGHT FIRE. THE CAR WAS PARKED IN MY GARAGE AND HAD NOT BEEN USED IN OVER 6 HOURS. THE CAR HAD 11,000 MILES ON IT. IT WAS LAST SERVICED BY MB OF COCONUT CREEK ONE MONTH EARLIER FOR THE ROUTINE 10K SERVICE. THE ONLY PROBLEM WE HAD WITH THE CAR WAS ONCE THE AIR-CONDITIONING FAILED TO WORK. I BELIEVE THE MB DEALERSHIP SAID IT WAS A FAULTY RELAY. THE CAR WAS ONLY SERVICED BY MB AT THE DEALERSHIP WHERE WE BOUGHT THE CAR. THE ENSUING FIRE CONSUMED MY GARAGE AND DESTROYED MY HOUSE. EVENTUALLY THE FIRE HIT OUR FUSE BOX CUTTING THE POWER TO THE HOME. THE LOSS OF ELECTRICITY WOKE ME UP. I HEARD A STRANGE NOISE AND INVESTIGATED. I SAW MY HOUSE ON FIRE AND WOKE EVERYONE UP AND WE ESCAPED UNHARMED. REPRESENTATIVES FROM MERCEDES AND MY HOMEOWNERS INSURANCE WILL BE CONDUCTING AN INVESTIGATION OF DECEMBER 5TH AT 9:00 AM AT MY HOME AT 21311 FALLS RIDGE WAY, BOCA RATON FL 33428
NHTSA complaint #11152194 — an unverified report by a vehicle owner.
The most recent complaints
In the owners' own words, exactly as filed with NHTSA.
Bolton, MA
UNKNOWN OR OTHER
Sunroof glass exploded without warning while driving at highway speed. Glass shards poured throughout the vehicle including on the driver, potentially putting the vehicle and other vehicles in danger.
NHTSA complaint #11748081 — an unverified report by a vehicle owner.
Bolton, MA
STRUCTURE:BODY
Sunroof glass exploded without warning while driving at highway speed. Glass shards poured throughout the vehicle including on the driver, potentially putting the vehicle and other vehicles in danger.
NHTSA complaint #11748081 — an unverified report by a vehicle owner.
Greenville, RI
ENGINE
I am filing a complaint regarding my 2018 Mercedes-Benz GLA 250. My vehicle recently triggered a check engine light and was diagnosed by an independent mechanic with code P052E, related to the positive crankcase ventilation regulator valve / crankcase ventilation system. My mechanic advised that this issue appears to be similar to a known Mercedes-Benz issue affecting other model years and/or related Mercedes models. Mercedes-Benz has issued an emissions extended warranty/service coverage for a similar crankcase ventilation / intake line assembly issue on other vehicles, including fault code P052E71. However, my vehicle does not appear to be included despite having the same or very similar failure code and system issue. I am concerned that this may be a broader defect affecting additional Mercedes vehicles beyond the models currently covered. The issue involves the crankcase ventilation/PCV system and may require repair of related intake line, valve cover, oil separator, or ventilation valve components. I believe this should be reviewed because owners of vehicles with the same failure pattern may be responsible for costly repairs even though the issue appears similar to one Mercedes has already acknowledged on other models. I am requesting that NHTSA review whether 2018 Mercedes-Benz GLA 250 vehicles should be included in any related recall, defect investigation, emissions warranty extension, or service campaign related to code P052E / P052E71 and the crankcase ventilation regulator valve system.
NHTSA complaint #11745674 — an unverified report by a vehicle owner.
Greenville, RI
FUEL/PROPULSION SYSTEM
I am filing a complaint regarding my 2018 Mercedes-Benz GLA 250. My vehicle recently triggered a check engine light and was diagnosed by an independent mechanic with code P052E, related to the positive crankcase ventilation regulator valve / crankcase ventilation system. My mechanic advised that this issue appears to be similar to a known Mercedes-Benz issue affecting other model years and/or related Mercedes models. Mercedes-Benz has issued an emissions extended warranty/service coverage for a similar crankcase ventilation / intake line assembly issue on other vehicles, including fault code P052E71. However, my vehicle does not appear to be included despite having the same or very similar failure code and system issue. I am concerned that this may be a broader defect affecting additional Mercedes vehicles beyond the models currently covered. The issue involves the crankcase ventilation/PCV system and may require repair of related intake line, valve cover, oil separator, or ventilation valve components. I believe this should be reviewed because owners of vehicles with the same failure pattern may be responsible for costly repairs even though the issue appears similar to one Mercedes has already acknowledged on other models. I am requesting that NHTSA review whether 2018 Mercedes-Benz GLA 250 vehicles should be included in any related recall, defect investigation, emissions warranty extension, or service campaign related to code P052E / P052E71 and the crankcase ventilation regulator valve system.
NHTSA complaint #11745674 — an unverified report by a vehicle owner.
Henderson, NV
ELECTRICAL SYSTEM
The vehicle experienced a sudden, total communication network crash on [XXX] the vehicle simultaneously triggered cascading critical safety system faults including “ inoperable” messages for the SOS system, Supplemental Restraint System ( SRS) and antilock brake system(ABS) along with check engine light on dashboard. The car locked itself in park and completely refuses to engage any drive gears. I took it to the dealer in Henderson, NV and they reported to me on Dec 24, 2025 that it will be a $1200 diagnostic and the repairs can be thousands of dollars. Since then I have taken it to 5 European and independent shops and have spent thousands of dollars for guess work. This happens sporadically I have been broken down where tow trucks have to retrieve my car and take to a shop where they have no clue of the issue. I am scared to drive it if it stalls on the streets and have a major accident. No problem has been resolved INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11741006 — an unverified report by a vehicle owner.
Henderson, NV
LANE DEPARTURE: BLIND SPOT DETECTION
The vehicle experienced a sudden, total communication network crash on [XXX] the vehicle simultaneously triggered cascading critical safety system faults including “ inoperable” messages for the SOS system, Supplemental Restraint System ( SRS) and antilock brake system(ABS) along with check engine light on dashboard. The car locked itself in park and completely refuses to engage any drive gears. I took it to the dealer in Henderson, NV and they reported to me on Dec 24, 2025 that it will be a $1200 diagnostic and the repairs can be thousands of dollars. Since then I have taken it to 5 European and independent shops and have spent thousands of dollars for guess work. This happens sporadically I have been broken down where tow trucks have to retrieve my car and take to a shop where they have no clue of the issue. I am scared to drive it if it stalls on the streets and have a major accident. No problem has been resolved INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11741006 — an unverified report by a vehicle owner.
Henderson, NV
FORWARD COLLISION AVOIDANCE: WARNINGS
The vehicle experienced a sudden, total communication network crash on [XXX] the vehicle simultaneously triggered cascading critical safety system faults including “ inoperable” messages for the SOS system, Supplemental Restraint System ( SRS) and antilock brake system(ABS) along with check engine light on dashboard. The car locked itself in park and completely refuses to engage any drive gears. I took it to the dealer in Henderson, NV and they reported to me on Dec 24, 2025 that it will be a $1200 diagnostic and the repairs can be thousands of dollars. Since then I have taken it to 5 European and independent shops and have spent thousands of dollars for guess work. This happens sporadically I have been broken down where tow trucks have to retrieve my car and take to a shop where they have no clue of the issue. I am scared to drive it if it stalls on the streets and have a major accident. No problem has been resolved INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11741006 — an unverified report by a vehicle owner.
na, CA
ENGINE
Why is the Crankcase Ventilation System P052E Code (PCV) covered in most Mercedes models, but not the GLA? This is an expensive repair that seems to cover other cars but penalizes GLA owners just to have a safe car to drive like the other models. I strongly believe GLA should be on the recall list for the matter, as it is dangerous to drive on the road, especially for those who cannot afford to fix it for upwards of $1,500 to $2000.
NHTSA complaint #11720771 — an unverified report by a vehicle owner.
Huntsville, AL
UNKNOWN OR OTHER
My vehicle has been taken to the Mercedes dealership multiple times from 2/24/25 -12/14/25 (10 Mths) for the following issues and still no resolution to the problem. Each time they say they've fixed the issues we get the car home and end up bringing it back a couple days later for the exact same issue. The issues being the Instrument Cluster/Panel failure (check engine light, multiple warning lights on display while driving, dash display is blacking out and unresponsive). The speedometer, fuel amount and mileage is also blacked out and unresponsive. The headlights, and tail lights also go off and are unresponsive while driving. We've also experienced the vehicle not going in reverse or drive and had to return it multiple times for this as well. These incidents are very serious safety hazards to the driver of the vehicle, other drivers and pedestrians. On several occasions we've addressed these problems with the dealership and still no resolve. However, we are paying very expensive labor fees only to return it with the same problems repeatedly and no explanation as to why the problem keeps recurring. We have receipts, photos and videos of this problem because the dealership kept stating they weren't seeing the issues we were seeing. However, after we presented the evidence and confirmation we have, they stated that they would conduct a diagnostic test and take a look, but the issues still have not been resolved after several times picking it up after they stated that they had changed the instrumental cluster. The last time after we returned it they discovered they had put the wrong part in the vehicle, however the same issues occurred with that part as well which is the reason we returned it to be looked at again. They changed it and still the same issue has repeated again. This is concerning and alarming that we were trusting them to work on the vehicle and driving the vehicle home thinking it is fixed and then discovering that they had put a wrong part in the car.
NHTSA complaint #11705978 — an unverified report by a vehicle owner.
Huntsville, AL
EXTERIOR LIGHTING
My vehicle has been taken to the Mercedes dealership multiple times from 2/24/25 -12/14/25 (10 Mths) for the following issues and still no resolution to the problem. Each time they say they've fixed the issues we get the car home and end up bringing it back a couple days later for the exact same issue. The issues being the Instrument Cluster/Panel failure (check engine light, multiple warning lights on display while driving, dash display is blacking out and unresponsive). The speedometer, fuel amount and mileage is also blacked out and unresponsive. The headlights, and tail lights also go off and are unresponsive while driving. We've also experienced the vehicle not going in reverse or drive and had to return it multiple times for this as well. These incidents are very serious safety hazards to the driver of the vehicle, other drivers and pedestrians. On several occasions we've addressed these problems with the dealership and still no resolve. However, we are paying very expensive labor fees only to return it with the same problems repeatedly and no explanation as to why the problem keeps recurring. We have receipts, photos and videos of this problem because the dealership kept stating they weren't seeing the issues we were seeing. However, after we presented the evidence and confirmation we have, they stated that they would conduct a diagnostic test and take a look, but the issues still have not been resolved after several times picking it up after they stated that they had changed the instrumental cluster. The last time after we returned it they discovered they had put the wrong part in the vehicle, however the same issues occurred with that part as well which is the reason we returned it to be looked at again. They changed it and still the same issue has repeated again. This is concerning and alarming that we were trusting them to work on the vehicle and driving the vehicle home thinking it is fixed and then discovering that they had put a wrong part in the car.
NHTSA complaint #11705978 — an unverified report by a vehicle owner.
Huntsville, AL
ELECTRICAL SYSTEM
My vehicle has been taken to the Mercedes dealership multiple times from 2/24/25 -12/14/25 (10 Mths) for the following issues and still no resolution to the problem. Each time they say they've fixed the issues we get the car home and end up bringing it back a couple days later for the exact same issue. The issues being the Instrument Cluster/Panel failure (check engine light, multiple warning lights on display while driving, dash display is blacking out and unresponsive). The speedometer, fuel amount and mileage is also blacked out and unresponsive. The headlights, and tail lights also go off and are unresponsive while driving. We've also experienced the vehicle not going in reverse or drive and had to return it multiple times for this as well. These incidents are very serious safety hazards to the driver of the vehicle, other drivers and pedestrians. On several occasions we've addressed these problems with the dealership and still no resolve. However, we are paying very expensive labor fees only to return it with the same problems repeatedly and no explanation as to why the problem keeps recurring. We have receipts, photos and videos of this problem because the dealership kept stating they weren't seeing the issues we were seeing. However, after we presented the evidence and confirmation we have, they stated that they would conduct a diagnostic test and take a look, but the issues still have not been resolved after several times picking it up after they stated that they had changed the instrumental cluster. The last time after we returned it they discovered they had put the wrong part in the vehicle, however the same issues occurred with that part as well which is the reason we returned it to be looked at again. They changed it and still the same issue has repeated again. This is concerning and alarming that we were trusting them to work on the vehicle and driving the vehicle home thinking it is fixed and then discovering that they had put a wrong part in the car.
NHTSA complaint #11705978 — an unverified report by a vehicle owner.
Williams, CA
UNKNOWN OR OTHER
Dear NHTSA Office of Defects Investigation, I am submitting a safety complaint regarding my 2018 Mercedes-Benz GLA 250 (VIN: [XXX] ). On October 28, 2025, while driving southbound on Interstate 5 near the Zamora Exit in California at approximately 8:15 a.m., the fully closed moonroof of my vehicle spontaneously shattered. There was no impact, debris, or external cause, and the vehicle was operated under normal conditions. The incident was extremely frightening and created a serious safety hazard while driving at freeway speed. I began shaking uncontrollably and immediately called my manager to report that I could not come into work due to shock. I also contacted my mother to help calm me down. Vehicle Details: VIN: [XXX] Mileage: 90,XXX miles Purchase: Approximately 5 years ago at Fairfield Mercedes-Benz dealership Condition: No prior repairs to the moonroof, no aftermarket modifications I have documented the incident with photos and video. I have reported this to Mercedes-Benz Customer Care and my insurance provider (USAA). Additionally, I have reached out to Washington Law Offices, who are currently handling a class action lawsuit regarding this issue. I am submitting this complaint to formally notify NHTSA of the dangerous defect and to request that the agency investigate this potential safety issue affecting Mercedes-Benz vehicles with panoramic or sunroof systems. Thank you for your attention to this matter. Please confirm receipt of this complaint and advise on any additional steps I should take. Sincerely, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11696092 — an unverified report by a vehicle owner.
Williams, CA
STRUCTURE:BODY
Dear NHTSA Office of Defects Investigation, I am submitting a safety complaint regarding my 2018 Mercedes-Benz GLA 250 (VIN: [XXX] ). On October 28, 2025, while driving southbound on Interstate 5 near the Zamora Exit in California at approximately 8:15 a.m., the fully closed moonroof of my vehicle spontaneously shattered. There was no impact, debris, or external cause, and the vehicle was operated under normal conditions. The incident was extremely frightening and created a serious safety hazard while driving at freeway speed. I began shaking uncontrollably and immediately called my manager to report that I could not come into work due to shock. I also contacted my mother to help calm me down. Vehicle Details: VIN: [XXX] Mileage: 90,XXX miles Purchase: Approximately 5 years ago at Fairfield Mercedes-Benz dealership Condition: No prior repairs to the moonroof, no aftermarket modifications I have documented the incident with photos and video. I have reported this to Mercedes-Benz Customer Care and my insurance provider (USAA). Additionally, I have reached out to Washington Law Offices, who are currently handling a class action lawsuit regarding this issue. I am submitting this complaint to formally notify NHTSA of the dangerous defect and to request that the agency investigate this potential safety issue affecting Mercedes-Benz vehicles with panoramic or sunroof systems. Thank you for your attention to this matter. Please confirm receipt of this complaint and advise on any additional steps I should take. Sincerely, [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11696092 — an unverified report by a vehicle owner.
at 45,695 milesDecatur, GA
AIR BAGS
The contact owns a 2018 Mercedes-Benz GLA 250. The contact stated that while driving at various speeds, various warning lights, including the check engine, TPMS (Tire Pressure Monitoring System), oil, and other warning lights, were intermittently illuminated. The vehicle was taken to a dealer for a diagnostic test; however, no faults were found with the vehicle. The contact stated that the sunroof failed to completely close; because of the failure, water was leaking inside the vehicle during inclement weather. In addition, the air bag warning light had also become illuminated. The vehicle was not yet repaired. The manufacturer was notified of the failure, and the contact was promised a call back. The failure mileage was 45,695.
NHTSA complaint #11694586 — an unverified report by a vehicle owner.
at 45,695 milesDecatur, GA
VISIBILITY:SUN/MOON ROOF ASSEMBLY
The contact owns a 2018 Mercedes-Benz GLA 250. The contact stated that while driving at various speeds, various warning lights, including the check engine, TPMS (Tire Pressure Monitoring System), oil, and other warning lights, were intermittently illuminated. The vehicle was taken to a dealer for a diagnostic test; however, no faults were found with the vehicle. The contact stated that the sunroof failed to completely close; because of the failure, water was leaking inside the vehicle during inclement weather. In addition, the air bag warning light had also become illuminated. The vehicle was not yet repaired. The manufacturer was notified of the failure, and the contact was promised a call back. The failure mileage was 45,695.
NHTSA complaint #11694586 — an unverified report by a vehicle owner.
at 45,695 milesDecatur, GA
ELECTRICAL SYSTEM
The contact owns a 2018 Mercedes-Benz GLA 250. The contact stated that while driving at various speeds, various warning lights, including the check engine, TPMS (Tire Pressure Monitoring System), oil, and other warning lights, were intermittently illuminated. The vehicle was taken to a dealer for a diagnostic test; however, no faults were found with the vehicle. The contact stated that the sunroof failed to completely close; because of the failure, water was leaking inside the vehicle during inclement weather. In addition, the air bag warning light had also become illuminated. The vehicle was not yet repaired. The manufacturer was notified of the failure, and the contact was promised a call back. The failure mileage was 45,695.
NHTSA complaint #11694586 — an unverified report by a vehicle owner.
Columbia, SC
UNKNOWN OR OTHER
This vehicle has a transmission control module defect. While driving, the car cuts off unexpectedly and prevents shifting gears, creating a serious safety risk that could easily cause an accident. A certified Mercedes-Benz dealer diagnosed the problem and confirmed it is an internal defect—one that cannot be prevented by regular maintenance or proper care of the vehicle. Because this is an internal issue, Mercedes-Benz should take immediate responsibility to repair it, rather than delaying or shifting accountability.
NHTSA complaint #11687218 — an unverified report by a vehicle owner.
Columbia, SC
ENGINE
This vehicle has a transmission control module defect. While driving, the car cuts off unexpectedly and prevents shifting gears, creating a serious safety risk that could easily cause an accident. A certified Mercedes-Benz dealer diagnosed the problem and confirmed it is an internal defect—one that cannot be prevented by regular maintenance or proper care of the vehicle. Because this is an internal issue, Mercedes-Benz should take immediate responsibility to repair it, rather than delaying or shifting accountability.
NHTSA complaint #11687218 — an unverified report by a vehicle owner.
Davenport, FL
ELECTRICAL SYSTEM
My vehicle electrical panel is messed up can not read the driver panel the sunroof electrical also is not working the driver seat chair electrical stopped working and ever since the sunroof n chair started giving me issues my front panels started to go haywire went to dealer ship cost n repair are over 4K for the panel sunroof 4-8k chair another 1-3k I regularly maintain my vehicle and should not be having these issues with the gentle care I give my car I can no longer drive it as it has major issues electrical and no one will buy it from me.
NHTSA complaint #11684208 — an unverified report by a vehicle owner.
Fresno, CA
POWER TRAIN
Rear differential is faulty. This is the second time it has failed. The first time was in October 2021 the mileage was 44,812 and it was repaired. More recently it was making a noise and I took it back to Mercedes Benz dealership for repair. It was not properly diagnosed over an 8 week period and now it has completely failed. After the fact, I discovered many more Mercedes Benz owners have had the same problem with this happening but there is no recall. I am reporting it so it can be noted that this is an on going issue with these vehicles and hopefully a recall of faulty equipment will be issued
NHTSA complaint #11673669 — an unverified report by a vehicle owner.
Davenport, FL
VISIBILITY:SUN/MOON ROOF ASSEMBLY
to a sunroof bonding issue that could cause water leakage
NHTSA complaint #11668964 — an unverified report by a vehicle owner.
Lincoln, NE
UNKNOWN OR OTHER
Crankcase Vent Valve needs replaced. Causes jumps in acceleration and pressure build up. Was a recall in other models. Took to a dealer today to confirm the check engine light and this was the cause.
NHTSA complaint #11664595 — an unverified report by a vehicle owner.
Lincoln, NE
FUEL/PROPULSION SYSTEM
Crankcase Vent Valve needs replaced. Causes jumps in acceleration and pressure build up. Was a recall in other models. Took to a dealer today to confirm the check engine light and this was the cause.
NHTSA complaint #11664595 — an unverified report by a vehicle owner.
at 110,000 milesFrostburg, MD
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV)
The contact owns a 2018 Mercedes-Benz GLA250. The contact stated that while the vehicle was parked, the check engine warning light illuminated. The contact used an OBD2 scanner and retrieved diagnostic trouble codes that indicated that the PCV valve had failed. The dealer was notified of the failure and advised the contact that the vehicle needed to be diagnosed to determine if the repair would be covered. The vehicle was not repaired. The contact related the failure to the Manufacturer Communication Number: 10241531. The manufacturer was not notified of the failure. The failure mileage was approximately 110,000.
NHTSA complaint #11648661 — an unverified report by a vehicle owner.
Benicia, CA
FUEL/PROPULSION SYSTEM
There was a gas smell that would seep into the driving cabin from the engine. It was intermittent however when it did occur, the smell was strong enough to cause light headedness to the occupants of the vehicle. I took the car to my personal mechanic who told me that this was a common issue with these cars; however, Mercedes had not issued a recall. I my mechanic fix the issue since they had already diagnosed the problem. I did some research and discovered that there is class action law suit regarding this same issue. (Please see link below:). I am respectfully requesting NHTSA conduct an investigation into this matter as this is definitely a safety hazard as the gas smell could impair the driver to the point of not being able to drive the vehicle safely. [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11645071 — an unverified report by a vehicle owner.