Owners have filed 265 complaints
about the 2011 Mercedes Benz E350 with NHTSA between 2011 and 2026.
The largest single group is the airbags.
Across this model's run it ranks 6 of 15 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 — 74
Against the median year of the Mercedes Benz E350. 50 means typical for this
model; 100 means roughly double.
Severity — 55
10.6% of these complaints
involved a crash, fire, injury or death, against a national rate of
9.7%.
Early failure — 38
22% of failures with a mileage on record happened under
36,000 miles, against a national rate of
29%.
How 2011 compares with every other Mercedes Benz E350
Odometer readings owners gave when they filed. About half of all
complaints include one.
Under 1,000 miles
11.1%
1,000 – 9,999 miles
22.2%
10,000 – 24,999 miles
910.0%
25,000 – 49,999 miles
2932.2%
50,000 – 74,999 miles
1820.0%
75,000 – 99,999 miles
2022.2%
100,000 – 149,999 miles
55.6%
150,000+ miles
66.7%
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.
Dec 2011peak 13Jul 2026
NHTSA investigations into the 2011 Mercedes Benz E350
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...
DP20004Opened 24 Apr 2020Closed 9 Oct 2020SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
Rear brake line failure
On April 10, 2020, NHTSA's Office of Defects Investigation (ODI) received a defect petition from Mr. Surjit Singh alleging premature corrosion of the rear brake lines in his 2013 Mercedes-Benz E350 sedan. The petitioner states that he was recently informed by a Mercedes dealer service department that his car had severely rusted brake lines that need[ed] to be replaced immediately at a cost of about $3300. He further stated that the dealer service advisor informed him that he had seen the issue on many cars like his. The petitioner requested ?that NHTSA launch an investigation into this serious...
Complaints that involved harm
Reports where the owner recorded a crash, a fire, an injury or a death.
at 176,000 milesSouth Holland, ILCrash1 injured
AIR BAGS
The contact owned a 2011 Mercedes-Benz E350. The contact stated while stopped at an intersection preparing to make a left turn, the vehicle crashed into the front driver's side and part of the driver's side front fender by another vehicle that had run a red light. The vehicle had severe crumpling of the hood and the driver's side fender. The contact stated that the front end was damaged and spread debris all over the roadway. Law Enforcement was on the scene and filed a Police report. The contact stated that the driver's side air bag did not deploy. The contact was transported by ambulance to an emergency room. The contact stated that he had suffered chest injuries from striking the steering wheel, and the contact stated that he had upper back pain and arm pain. The contact stated that the vehicle was towed to an impound lot. The contact had been advised by the Insurance Provider that the vehicle was a total loss. The manufacturer had been informed of the failure. The failure mileage was approximately 176,000.
NHTSA complaint #11513005 — an unverified report by a vehicle owner.
at 130,000 milesCanton, MICrash1 injured
AIR BAGS
The contact owned a 2011 Mercedes-Benz E350. The contact stated that while his daughter was driving approximately 30 - 35 MPH, another vehicle crashed into the driver's side front door. The contact stated that the steering wheel and knee air bags deployed upon impact. The contact was unaware of the side curtain air bags had deployed; and if so, did the Emergency Response Unit cut away the curtain air bags to remove his daughter from the vehicle prior to his arrival. The contact stated that the driver’s side door was totally smashed but he did not see where the side curtain air bags might have deployed. The contact's daughter was transported by ambulance to the hospital with a fractured and dislocated pelvic bone in four locations and a fractured left arm. A police report was filed. The vehicle was towed to a salvage yard and deemed totaled by the insurance company. The manufacturer was not made aware of the failure. The failure mileage was approximately 130,000.
NHTSA complaint #11446291 — an unverified report by a vehicle owner.
Tustin, CACrash1 injured
SEATS
What component or system failed or malfunctioned, and is it available for inspection upon request? The back of the driver seat failed due to my car being rear ended. How was your safety or the safety of others put at risk? Unable to sit looking straight forward when driving. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. By Mercedes Benz dealer Fletcher Jones of Newport Beach, CA. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? I have reported the problem to my auto insurance co.: AAA. AAA said they need to send their own appraiser to confirm the finding of the Mercedes Benz dealer. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? None. My auto was rear ended on 3-22-21. Immediately, the problem was reported to AAA. Prior to 3-22-21, my auto was with my regular repair shop for regular oil changes and nothing was reported was wrong with the driver seat. I waiting for AAA decision in order to do repairs. I have three emails from Mercedes dealer and from AAA auto insurance. I could not figure out to forward them to you.
NHTSA complaint #11433714 — an unverified report by a vehicle owner.
North Hollywood, CACrash
STRUCTURE:BODY
hit and run
NHTSA complaint #11424155 — an unverified report by a vehicle owner.
Tustin, CACrash1 injured
AIR BAGS
On 3-22-2021, my car was rear ended. The car that that rear ended my car was going at a high speed: the neck rests opened due to the accident. The air bags did not open. I noticed that there was a recall on airbags for 2011 Mercedes but no recall for my VIN. How can I know that my air bags function?
NHTSA complaint #11422670 — an unverified report by a vehicle owner.
at 95,000 milesHouston, TXCrash1 injured
AIR BAGS
I WAS DRIVING HOME FROM WORK AT APPROXIMATELY 1:30 PM ON A CLEAR, SUNNY DAY, ABOUT A MINUTE AWAY FROM MY HOME. THE ROAD CONDITIONS WERE GOOD, AND THERE WAS NO TRAFFIC. I STOPPED AT THE CORNER TO MAKE A LEFT TURN. AS I PROCEEDED TO TURN, THE CAR SUDDENLY ACCELERATED. I IMMEDIATELY APPLIED THE BRAKES, BUT THEY DID NOT ENGAGE. I HAD NO CONTROL OF THE CAR. IT JUMPED THE CURB ( CAUGHT ON PROPERTY OWNER'S CAMERA, GOING AIR BORN) , AS I CONTINUED TO BRAKE AS HARD AS I COULD WITH THE CAR INCREASINGLY ACCELERATING.I CRASHED THROUGH A FENCE AND HIT A POLE WHICH STOPPED THE CAR DEPLOYING BOTH DRIVER SIDE AIRBAGS. THERE WAS SEVERE DAMAGE TO THE FRONT RIGHT SIDE OF THE CAR, AND IT WAS TOTALED. I WAS TAKEN TO THE HOSPITAL VIA AMBULANCE.MY INJURY WAS DIAGNOSED AS ACUTE L1 COMPRESSION FRACTURE ALONG THE SUPERIOR ENDPLATE WITH MILD ANTERIOR WEDGING. I WAS REFERRED TO AN ORTHOPEDIC SPECIALIST AND HAVE NOT RETURNED TO WORK DUE TO PAIN AND ELEVATED BLOOD PRESSURE. TO MAKE MATTERS WORSE, TWO DAYS LATER I WAS ISSUED A WARNING FOR FAILURE TO CONTROL SPEED!@&!
NHTSA complaint #11301964 — an unverified report by a vehicle owner.
The most recent complaints
In the owners' own words, exactly as filed with NHTSA.
Morristown, TN
SEATS
Without an impact or collision, my car's passenger seat headrest shot out. I've been checking and others have done this as well. This morning, the driver's side headrest shot out without impact or collision. There is something wrong with the mechanism or airbags for the headrests. This can be extremely dangerous when in motion....
NHTSA complaint #11753259 — an unverified report by a vehicle owner.
Morristown, TN
AIR BAGS
Without an impact or collision, my car's passenger seat headrest shot out. I've been checking and others have done this as well. This morning, the driver's side headrest shot out without impact or collision. There is something wrong with the mechanism or airbags for the headrests. This can be extremely dangerous when in motion....
NHTSA complaint #11753259 — an unverified report by a vehicle owner.
Hanover, MN
SERVICE BRAKES
Dealer notes: Replace rear brake lines, found to be rusty recommend replacement with rear subframe replacement. This is a very well known issue and is not covered under recall from manufacturer. It will cost $3200 for brake line repair alone, not including the subframe. This is an extreme safety hazard and a common problem that has been acknowledged by the manufacturer.
NHTSA complaint #11707695 — an unverified report by a vehicle owner.
Swampscott, MA
STEERING
Subject: Safety Concern – Mercedes-Benz E350 4MATIC (2011) Subframe and Brake Line Rust Dear [Mercedes-Benz Customer Care / NHTSA], I am writing to report a serious safety concern regarding my 2011 Mercedes-Benz E350 4MATIC. Recently, I brought my vehicle in for recall service, and during the inspection, it was discovered that: The rear subframe is broken due to rust. The brake lines are extremely rusted, and I was advised that I could lose braking control if they are not replaced immediately. The estimated repair cost exceeds $4,000. I have been a long-time owner of Mercedes-Benz vehicles and part of the Mercedes-Benz family. However, I am now deeply concerned about the safety of myself, my family, and others on the road due to this severe corrosion issue, which I believe may be a widespread defect. I respectfully request that Mercedes-Benz investigate this issue and provide assistance, as the failure of these critical components poses a serious safety hazard. Thank you for your attention to this urgent matter. Sincerely, [XXX] [Phone: [XXX] ] [Email: [XXX] ] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11689944 — an unverified report by a vehicle owner.
Swampscott, MA
SERVICE BRAKES
Subject: Safety Concern – Mercedes-Benz E350 4MATIC (2011) Subframe and Brake Line Rust Dear [Mercedes-Benz Customer Care / NHTSA], I am writing to report a serious safety concern regarding my 2011 Mercedes-Benz E350 4MATIC. Recently, I brought my vehicle in for recall service, and during the inspection, it was discovered that: The rear subframe is broken due to rust. The brake lines are extremely rusted, and I was advised that I could lose braking control if they are not replaced immediately. The estimated repair cost exceeds $4,000. I have been a long-time owner of Mercedes-Benz vehicles and part of the Mercedes-Benz family. However, I am now deeply concerned about the safety of myself, my family, and others on the road due to this severe corrosion issue, which I believe may be a widespread defect. I respectfully request that Mercedes-Benz investigate this issue and provide assistance, as the failure of these critical components poses a serious safety hazard. Thank you for your attention to this urgent matter. Sincerely, [XXX] [Phone: [XXX] ] [Email: [XXX] ] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11689944 — an unverified report by a vehicle owner.
Kansas City, MO
SUSPENSION
Rear crossmember or ( rear subframe frame ) rust and It broke due to corrosion
NHTSA complaint #11688969 — an unverified report by a vehicle owner.
Geneva, IL
SERVICE BRAKES
Brake lines have completely rusted through. Car had additional rust issues on the subframe which Mercedes admitted and replaced as part of an extended warranty . When that was repaired they never mentioned the brakes. Now 3 months later the brake lines rusted completely through … seems both subframe and lines rust at the same rate. And I would presume both cause equal safety risk. Why have they not yet issued an extended warranty on the brake lines? Both of these appear to be common issues. Hopefully NHTSA can encourage a change.
NHTSA complaint #11683829 — an unverified report by a vehicle owner.
Walpole, MA
ENGINE
Brake lines rust and corrode at the plastic support clips. Brake lines are not made from quality materials. Suffrage also corroded. Suffrage was changed by dealer though when vehicle was returned the Brake lines were broken. Car entered Suffrage service with brake lines intact, rusted i wouldn't doubt but intact. When returned after changing Suffrage, brake line was broken and leaking brake fluid. Extremely dangerous to return vehicle with broken brake lines and expected Owner to drive away with no brakes. Changing brake lines was offered at a cost of $4000 but the lines were not broken upon dropping off for service. Brake lines should be warrantied and changed to a less corrosive material. Engine mounts fail and cause vibration.
NHTSA complaint #11683488 — an unverified report by a vehicle owner.
Walpole, MA
SERVICE BRAKES
Brake lines rust and corrode at the plastic support clips. Brake lines are not made from quality materials. Suffrage also corroded. Suffrage was changed by dealer though when vehicle was returned the Brake lines were broken. Car entered Suffrage service with brake lines intact, rusted i wouldn't doubt but intact. When returned after changing Suffrage, brake line was broken and leaking brake fluid. Extremely dangerous to return vehicle with broken brake lines and expected Owner to drive away with no brakes. Changing brake lines was offered at a cost of $4000 but the lines were not broken upon dropping off for service. Brake lines should be warrantied and changed to a less corrosive material. Engine mounts fail and cause vibration.
NHTSA complaint #11683488 — an unverified report by a vehicle owner.
Phoenix, AZ
FUEL/PROPULSION SYSTEM
A gasoline smells fills the cabin and the outside surrounding area the vehicle continually to the point making anyone surrounding the vehicle and or sitting in the front and back seats physically sick. The gasoline smells omits continually from the backseat and or trunk area no matter the amount of fuel that is in the tank. It is a fire hazard and also health hazard as well.
NHTSA complaint #11675838 — an unverified report by a vehicle owner.
at 156,094 milesSelma, AL
AIR BAGS
The contact owns a 2011 Mercedes-Benz E350. The contact stated that while starting the vehicle, the SRS Malfunction message was displayed. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 156,094.
NHTSA complaint #11671719 — an unverified report by a vehicle owner.
Wesley Chapel, FL
SUSPENSION
This vehicle, with 115,000 miles has been discovered to have had the brackets in the subframe for BOTH rear lateral arms rust through and are broken causing a $5,000 repair estimate. The mechanic who found this (42 years as a mechanic) said he has never seen anything like it. This is a car where I had to replace the transmission at 49,000 miles and the control unit at 62,000 miles (over $13,000 in repairs). I saw through AI search that this problem has been reported many times but has not prompted an investigation. This issue should NEVER happen and is a MAJOR SAFETY threat.
NHTSA complaint #11652830 — an unverified report by a vehicle owner.
Springfield, VA
SERVICE BRAKES
Rear brake lines are known to corrode. Had to get my line replaced at 78xxx miles. This is a common problem for the w212 Mercedes, along with the rear sub-frame rusting away. If the brake lines bursted when I was driving, I could of lost my life.
NHTSA complaint #11647869 — an unverified report by a vehicle owner.
Westfield, MA
WHEELS
Broken rear sub frame.
NHTSA complaint #11630893 — an unverified report by a vehicle owner.
Westfield, MA
UNKNOWN OR OTHER
Broken rear sub frame.
NHTSA complaint #11630893 — an unverified report by a vehicle owner.
Westfield, MA
SUSPENSION
Broken rear sub frame.
NHTSA complaint #11630893 — an unverified report by a vehicle owner.
at 159,143 milesRomoland, CA
FUEL SYSTEM, GASOLINE
The contact owns a 2011 Mercedes-Benz E350. The contact stated that on multiple occasions when fuel was administered into the vehicle, he observed a strong fuel odor in the cabin. The vehicle was taken to the residence and parked. The contact stated that as he came out to inspect the vehicle he observed a leak under the vehicle near the fuel spout. The vehicle was inspected and the rear seat and the access panel were removed and a large amount of condensation was present near the fuel tank. The vehicle was taken to a dealer where it has yet to be diagnosed. The manufacturer was notified of the failure. The failure mileage was 159,143.
NHTSA complaint #11625265 — an unverified report by a vehicle owner.
St Louis, MO
SERVICE BRAKES
The known Subframe rust recall issue has caused the brake lines to rust and mercedes in St Louis wont cover the expense to fix this known extra problem. They want $2200.00 to fix the brakes that other dealers would charge half for. They want to escape this problem and I just want this fixed at their cost.
NHTSA complaint #11618566 — an unverified report by a vehicle owner.
Birmingham, AL
SUSPENSION
Driving on interstate, hit the brakes and noticed the car was swaying hard to the left. After that it progressively got worse. When hitting even the smallest bump or braking I heard a metal on metal ‘thunk’ sound. My daughters were in the car and it was frightening. Upon further inspection by a Mercedes mechanic, the secondary frame had rusted and snapped into. After reading forums online I found it’s very common. They rust from the inside out. There was absolutely NO previous warning.
NHTSA complaint #11611182 — an unverified report by a vehicle owner.
Elmont, NY
SUSPENSION
Rear subframe rusted and broken apart.
NHTSA complaint #11609172 — an unverified report by a vehicle owner.
Elmont, NY
STRUCTURE:BODY
Rear subframe rusted and broken apart.
NHTSA complaint #11609172 — an unverified report by a vehicle owner.
at 108,000 milesWinston Salem, NC
POWER TRAIN
The contact owns a 2011 Mercedes-Benz E-350. The contact stated while driving at various speeds, the steering wheel would occasionally become difficult to maneuver. The contact stated the power steering fluid was previously refilled. The air bag warning light was illuminated intermittently. Additionally, the contact stated that there was an unusual amount of smoke coming from under the hood occasionally. The vehicle was taken to an independent mechanic, where it was diagnosed that the power steering fluid might have leaked. The mechanic could not determine the cause of the failure. An unknown local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 108,000.
NHTSA complaint #11606731 — an unverified report by a vehicle owner.
Antelope, CA
AIR BAGS
The contact owns a 2011 Mercedes-Benz E350. The contact received notification of NHTSA Campaign Number: 16V081000 (Air Bags); however, the part to do the recall repair was not yet available. The local dealer and another dealer, Mercedes-Benz of Sacramento (1810 Howe Ave, Sacramento, CA 95825) were contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue and a case was opened. The contact had not experienced a failure. Parts distribution disconnect.
NHTSA complaint #11596451 — an unverified report by a vehicle owner.
West Nyack, NY
SERVICE BRAKES
I bought my vehicle to the Mercedes dealership to get the rear subframe replaced under extended warranty due to it being rusted and broken from the rear suspension attachment points. While the Mercedes technician had the subframe removed he noted that the rear brake lines which are routed under the body and between the subframe had significant rust/corrosion on them.
NHTSA complaint #11589737 — an unverified report by a vehicle owner.
Glendale, AZ
FUEL/PROPULSION SYSTEM
With less than 40,000 miles on the odometer, I noticed a gas smell both inside the car and outside. I was able to access the fuel filter assembly on the top of the gas tank and found it had a substantial leak resulting in a puddle of fuel on the assembly. The car has never been in a wreck on had any damage that would cause this problem. I researched and found earlier years of the same model had this problem resulting in Mercedes Benz extending the warranty to 150,000 miles for this part. They have refused to warranty my car. This is a major safety issue and by releasing gas fumes into the atmosphere is an environmental problem as well.
NHTSA complaint #11566557 — an unverified report by a vehicle owner.