Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade:
A
B
C
D
F
ungraded
What breaks on a 2002 Mercedes Benz SLK320
Every complaint is filed against a part. Follow any row for the complaints about that part alone.
Brakes
535.7%
Median failure at 64,807 miles
Lights
321.4%
Median failure at 90,500 miles
Stability & Traction Control
214.3%
Median failure at 66,403 miles
Windows, Mirrors & Wipers
214.3%
Median failure at 103,500 miles
Electrical System
17.1%
Median failure at 68,000 miles
Engine & Cooling
17.1%
Median failure at 145,000 miles
When it fails
Odometer readings owners gave when they filed. About half of all
complaints include one.
10,000 – 24,999 miles
17.7%
25,000 – 49,999 miles
17.7%
50,000 – 74,999 miles
646.2%
75,000 – 99,999 miles
215.4%
100,000 – 149,999 miles
323.1%
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.
Sep 2012peak 3Dec 2025
The most recent complaints
In the owners' own words, exactly as filed with NHTSA.
Clearlake, CA
EXTERIOR LIGHTING
Previous recall 05V505 has been completed but the issue has returned the issue has been intermittent for a fee months but the tail light has been non op for a few months, i have tried different sockets and bulbs to no avail. The issue has not caused any incidents but i have no brake light on the drivers side due to melting on the lamp itself aswell as the pins on the connector are warped
NHTSA complaint #11703211 — an unverified report by a vehicle owner.
at 106,000 milesNorth Myrtle Beach, SC
EXTERIOR LIGHTING
The contact owns a 2002 Mercedes-Benz SLK320. The contact stated that while operating the vehicle, the message that the rear light had malfunctioned was displayed. Upon inspection, it was discovered that while depressing the brake pedal, the driver’s side brake light failed to illuminate as needed. The vehicle was taken to the local mechanic who diagnosed that the rear lamp module was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer and local dealer were notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 05V505000 (Exterior Lighting). The contact stated that the vehicle had experienced that failure listed in the recall. The failure mileage was 106,000.
NHTSA complaint #11524795 — an unverified report by a vehicle owner.
at 145,000 milesClearwater, FL
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
The contact owns a 2002 Mercedes-Benz SLK320. The contact stated while driving 55 MPH, the vehicle failed to accelerate as it went into Limp mode. Several warning lights were illuminated. The contact stated that he had replaced the spark plugs and the accelerator pedal; however, the failure persisted, and the engine was misfiring. The vehicle was taken to an independent mechanic, where it was diagnosed that the PCM, the speed sensor, and the ignition coil were malfunctioning. The vehicle was not repaired. Additionally, the contact stated that the defroster had failed. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure and confirmed that the vehicle was not included in a recall. The manufacturer referred the contact to the NHTSA hotline for assistance. The approximate failure mileage was 145,000.
NHTSA complaint #11513974 — an unverified report by a vehicle owner.
at 145,000 milesClearwater, FL
ENGINE
The contact owns a 2002 Mercedes-Benz SLK320. The contact stated while driving 55 MPH, the vehicle failed to accelerate as it went into Limp mode. Several warning lights were illuminated. The contact stated that he had replaced the spark plugs and the accelerator pedal; however, the failure persisted, and the engine was misfiring. The vehicle was taken to an independent mechanic, where it was diagnosed that the PCM, the speed sensor, and the ignition coil were malfunctioning. The vehicle was not repaired. Additionally, the contact stated that the defroster had failed. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure and confirmed that the vehicle was not included in a recall. The manufacturer referred the contact to the NHTSA hotline for assistance. The approximate failure mileage was 145,000.
NHTSA complaint #11513974 — an unverified report by a vehicle owner.
at 68,000 milesHumble, TX
ELECTRICAL SYSTEM
THE BAS/ESP LIGHT AND SUDDEN BRAKING JUST OCCURRED TODAY(10.11.16) ON OUR 2002 MERCEDES BENZ SLK 320. THIS HAPPENED THREE TIMES IN ABOUT AN HOUR OF DRIVING ON CITY STREETS BETWEEN 15 AND 45 MPH. ONE OCCURRENCE WAS WHILE DRIVING STRAIGHT, THE OTHER TWO HAPPENED WHILE CHANGING LANES IN MOVING TRAFFIC. THE EXPERIENCE TODAY WAS THAT THE CAR HAD A BRIEF MOMENTARY HARD BRAKING. FIRST ON THE LEFT FRONT AND THEN THE RIGHT FRONT (2 SEPARATE TIMES). EACH WAS A SEPARATE INCIDENT AND EACH TIME THE BAS/ESP LIGHT LIT UP AFTERWARD. AFTER INTERNET RESEARCH, IT APPEARS THAT THIS IS A COMMON PROBLEM AMONG THE SLK LINE AND POSSIBLY EXTENDS TO OTHER MODELS. IN MERCEDES BENZ ONLINE COMMUNITIES, MANY OTHERS HAVE STATED EXPERIENCING THIS SAME PROBLEM. THERE ARE APPARENTLY NUMEROUS POTENTIAL REMEDIES. TO MY KNOWLEDGE, THE CULPRITS(S) COULD BE, BUT ARE NOT LIMITED TO, NUMEROUS SENSORS MALFUNCTIONING. I.E.: YAW SENSOR, LATERAL ACCELERATION SENSOR, STEERING ANGLE SENSOR, BAS RELEASE SWITCH, MAF SENSOR, ROTATIONAL SPEED SENSOR, TO NAME A FEW. THIS SEEMS TO BE OCCURRING OFTEN ENOUGH TO DEMAND A RECALL.
NHTSA complaint #10915378 — an unverified report by a vehicle owner.
at 68,000 milesHumble, TX
SERVICE BRAKES
THE BAS/ESP LIGHT AND SUDDEN BRAKING JUST OCCURRED TODAY(10.11.16) ON OUR 2002 MERCEDES BENZ SLK 320. THIS HAPPENED THREE TIMES IN ABOUT AN HOUR OF DRIVING ON CITY STREETS BETWEEN 15 AND 45 MPH. ONE OCCURRENCE WAS WHILE DRIVING STRAIGHT, THE OTHER TWO HAPPENED WHILE CHANGING LANES IN MOVING TRAFFIC. THE EXPERIENCE TODAY WAS THAT THE CAR HAD A BRIEF MOMENTARY HARD BRAKING. FIRST ON THE LEFT FRONT AND THEN THE RIGHT FRONT (2 SEPARATE TIMES). EACH WAS A SEPARATE INCIDENT AND EACH TIME THE BAS/ESP LIGHT LIT UP AFTERWARD. AFTER INTERNET RESEARCH, IT APPEARS THAT THIS IS A COMMON PROBLEM AMONG THE SLK LINE AND POSSIBLY EXTENDS TO OTHER MODELS. IN MERCEDES BENZ ONLINE COMMUNITIES, MANY OTHERS HAVE STATED EXPERIENCING THIS SAME PROBLEM. THERE ARE APPARENTLY NUMEROUS POTENTIAL REMEDIES. TO MY KNOWLEDGE, THE CULPRITS(S) COULD BE, BUT ARE NOT LIMITED TO, NUMEROUS SENSORS MALFUNCTIONING. I.E.: YAW SENSOR, LATERAL ACCELERATION SENSOR, STEERING ANGLE SENSOR, BAS RELEASE SWITCH, MAF SENSOR, ROTATIONAL SPEED SENSOR, TO NAME A FEW. THIS SEEMS TO BE OCCURRING OFTEN ENOUGH TO DEMAND A RECALL.
NHTSA complaint #10915378 — an unverified report by a vehicle owner.
at 68,000 milesHumble, TX
ELECTRONIC STABILITY CONTROL (ESC)
THE BAS/ESP LIGHT AND SUDDEN BRAKING JUST OCCURRED TODAY(10.11.16) ON OUR 2002 MERCEDES BENZ SLK 320. THIS HAPPENED THREE TIMES IN ABOUT AN HOUR OF DRIVING ON CITY STREETS BETWEEN 15 AND 45 MPH. ONE OCCURRENCE WAS WHILE DRIVING STRAIGHT, THE OTHER TWO HAPPENED WHILE CHANGING LANES IN MOVING TRAFFIC. THE EXPERIENCE TODAY WAS THAT THE CAR HAD A BRIEF MOMENTARY HARD BRAKING. FIRST ON THE LEFT FRONT AND THEN THE RIGHT FRONT (2 SEPARATE TIMES). EACH WAS A SEPARATE INCIDENT AND EACH TIME THE BAS/ESP LIGHT LIT UP AFTERWARD. AFTER INTERNET RESEARCH, IT APPEARS THAT THIS IS A COMMON PROBLEM AMONG THE SLK LINE AND POSSIBLY EXTENDS TO OTHER MODELS. IN MERCEDES BENZ ONLINE COMMUNITIES, MANY OTHERS HAVE STATED EXPERIENCING THIS SAME PROBLEM. THERE ARE APPARENTLY NUMEROUS POTENTIAL REMEDIES. TO MY KNOWLEDGE, THE CULPRITS(S) COULD BE, BUT ARE NOT LIMITED TO, NUMEROUS SENSORS MALFUNCTIONING. I.E.: YAW SENSOR, LATERAL ACCELERATION SENSOR, STEERING ANGLE SENSOR, BAS RELEASE SWITCH, MAF SENSOR, ROTATIONAL SPEED SENSOR, TO NAME A FEW. THIS SEEMS TO BE OCCURRING OFTEN ENOUGH TO DEMAND A RECALL.
NHTSA complaint #10915378 — an unverified report by a vehicle owner.
at 75,000 milesWest Chester, PA
EXTERIOR LIGHTING:TAIL LIGHTS
TL* THE CONTACT OWNS A 2002 MERCEDES-BENZ SLK320. THE CONTACT STATED THAT THE TAIL LIGHTS FAILED AND AN UNKNOWN ERROR MESSAGE ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS PREVIOUSLY SERVICED UNDER A MANUFACTURER SATISFACTION CAMPAIGN; HOWEVER, THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE TAIL LIGHT ASSEMBLIES WERE REPLACED, BUT THE FAILURE CONTINUED INTERMITTENTLY. THE CONTACT STATED THAT THE FAILURE OCCURRED ON SIX OCCASIONS. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 75,000. ..UPDATED 07/20/16 *BF THE CONSUMER STATED AFTER THE VEHICLE WAS RETURNED FROM THE DEALER THE GAS CAP LIGHT ILLUMINATED. THE CONSUMER WAS CONCERNED THE VEHICLE WAS UNSAFE TO DRIVE. UPDATED 10/19/2017
NHTSA complaint #10881746 — an unverified report by a vehicle owner.
at 34,000 milesMadison, IN
SERVICE BRAKES
TL* THE CONTACT OWNS A 2002 MERCEDES BENZ SLK320. THE CONTACT STATED THAT WHILE DRIVING AT 60 MPH, THE VEHICLE STALLED AND UNKNOWN WARNING LIGHTS ILLUMINATED. IN ADDITION, THE BRAKE AUTOMATICALLY ENGAGED CAUSING THE VEHICLE TO RESTART. IN ADDITION, THE REAR AND DRIVER SIDE MIRRORS AUTOMATICALLY DIMMED IN LIGHTING CAUSING IT HARDER TO VIEW THE ROAD WHEN DRIVING. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT THE BRAKE SWITCH NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 34,000. UPDATED 09/09/15*LJ UPDATED 10/31/2017
NHTSA complaint #10730534 — an unverified report by a vehicle owner.
at 16,600 milesLewes, DE
SERVICE BRAKES
FAST MOVING TRAFFIC, DRY WEATHER. ALL OF A SUDDEN CAR APPLIED BRAKES, THOUGHT I WAS HAVING ONE OF THE TIRES BREAKING INTO PIECES. THIS LASTED UNTIL I PULLED OVER AND STOPPED, NEVER EXPERIENCED ANYTHING LIKE THIS. AN INEXPERIENCED DRIVER IN THIS FAST TRAFFIC SURELY WOULD HAVE HAD AN ACCIDENT, MAYBE EVEN FATALLY. ANYWAY, I SAW NOTHING BROKEN, ALL TIRE IN TACT, SO I CONTINUED. THIS WAS IN FL AND HAVING JUST PURCHASED THE VEHICLE THE NIGHT BEFORE, I WAS ON A LONG JOURNEY TO MY HOME STATE DE. IT DID HAPPEN A COUPLE OF MORE TIME WITH LIGHTER IMPACT. TODAY IS MONDAY SEPT.29TH, I AM BACK AND HAVE BEEN RESEARCHING MBENZ FORUMS AND FOUND OUT, NOT DEFINITE, PEOPLE BELIEVE IT IS YAW SENSOR. I BELIEVE THIS IS A SERIOUS ISSUE AND NEEDS TO BE DEALT WITH AS SOON AS POSSIBLE.
NHTSA complaint #10639907 — an unverified report by a vehicle owner.
at 98,500 milesArlington, TX
SERVICE BRAKES, HYDRAULIC
THE CAR SUDDENLY BRAKES FOR ABOUT ONE SECOND, AND THE BAS-ESP LIGHTS ILLUMINATE, AND IT RESUMES TO NORMAL DRIVING.
NHTSA complaint #10609717 — an unverified report by a vehicle owner.
at 64,807 milesPikeville, TN
SERVICE BRAKES
SUDDENLY, FOR NO REASON, THE RIGHT FRONT BRAKE ACTIVATED, CAUSING THE CAR TO PULL TO THE RIGHT. THIS RELEASED WITHIN A SECOND. I STOPPED AND RESTARTED. THIS HAPPENED AGAIN AT ABOUT 60 MILES PER HOUR. I HAD THE CAR CHECKED BY A CERTIFIED MECHANIC. SEVERAL SENSORS WERE REPLACED. THE PROBLEM CONTINUED SEVERAL MORE TIMES. I CALLED MERCEDES ABOUT THE PROBLEM. THEY WANTED ME TO TAKE IT TO DEALER AND PAY THE DEALER TO CHECK THE PROBLEM. THE PROBLEM GOT WORSE OVER TIME. I HAD TO REPLACE THE BATTERY A FEW MONTHS AGO. SINCE THEN, I HAVE HAD NO MORE PROBLEMS. THIS CAUSES A GREAT DEAL OF CONCERN. I DO NOT DO KNOW IF THE PROBLEM IS FIXED AND IF IT IS, WHAT FIXED IT. THIS IS KNOW ISSUE TO MERCEDES.
NHTSA complaint #10576072 — an unverified report by a vehicle owner.
at 64,807 milesPikeville, TN
ELECTRONIC STABILITY CONTROL (ESC)
SUDDENLY, FOR NO REASON, THE RIGHT FRONT BRAKE ACTIVATED, CAUSING THE CAR TO PULL TO THE RIGHT. THIS RELEASED WITHIN A SECOND. I STOPPED AND RESTARTED. THIS HAPPENED AGAIN AT ABOUT 60 MILES PER HOUR. I HAD THE CAR CHECKED BY A CERTIFIED MECHANIC. SEVERAL SENSORS WERE REPLACED. THE PROBLEM CONTINUED SEVERAL MORE TIMES. I CALLED MERCEDES ABOUT THE PROBLEM. THEY WANTED ME TO TAKE IT TO DEALER AND PAY THE DEALER TO CHECK THE PROBLEM. THE PROBLEM GOT WORSE OVER TIME. I HAD TO REPLACE THE BATTERY A FEW MONTHS AGO. SINCE THEN, I HAVE HAD NO MORE PROBLEMS. THIS CAUSES A GREAT DEAL OF CONCERN. I DO NOT DO KNOW IF THE PROBLEM IS FIXED AND IF IT IS, WHAT FIXED IT. THIS IS KNOW ISSUE TO MERCEDES.
NHTSA complaint #10576072 — an unverified report by a vehicle owner.
at 62,000 milesWilliamsburg, VA
VISIBILITY/WIPER
THE INSIDE REAR VIEW MIRROR IN MY 2002 MERCEDES-BENZ SLK32 IS AN ELECTRO CHROMIC SELF-DIMMING MIRROR THAT HAS NO MANUAL BACKUP. THE MIRROR CONTAINED A FLUID WHICH APPEARS TO HAVE LEAKED OUT PRIOR TO MY PURCHASE OF THE CAR A FEW MONTHS AGO THAT CAUSES THE SELF-DIMMING MIRROR TO FAIL TO PROVIDE DIMMING AGAINST REAR APPROACHING HEADLIGHTS. THIS INABILITY TO DIM CAUSES ME TO BE BLINDED FORCING ME TO TURN THE MIRROR AWAY WHICH ELIMINATES REAR VIEW CAPABILITY WHILE UNDERWAY. THERE ARE MANY DOCUMENTED CASES OF THESE MIRRORS FAILING IN VARIOUS MAKES AND MODELS AS A RESULT OF USUALLY FROM THE INTERNAL FLUID LEAKING.
NHTSA complaint #10474354 — an unverified report by a vehicle owner.