2009 Mercedes-Benz C-Class
Problems, recalls and owner-reported issues
Electrical system is the leading concern among 670 owner complaints filed for this model year. This is the 2nd highest complaint count among 23 C-Class model years with reports.
Of the 2009 reports, 17 involved a crash and 19 involved a fire. 16 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints: exterior lighting
138 reports, newest first. Show all
Electrical system, Exterior lighting, Jul 4, 2026
The tail lamps of my car do not function appropriately - the right tail lamp is completely dead most of the time and the left tail lamp constantly dims and flickers. Mercedes previously issued a recall campaign (no. 2014050001) because "DAG determined that oxidation on the ground pin connector for the rear tail lamps of subject vehicles can result in a dimming of the tail lights or loss of tail lamp functions. . . . [t]he loss of a rear tail lamp reduces the rearward visibility of subject vehicles . . . and may increase the likelihood of a rear end crash." The recall has been performed on my car, but the issues and danger continue to persist. I visually inspected the pin connectors of the tail lamps, confirmed that they still suffer from oxidization (and that they may have slightly burned due to the oxidization), causing the same continuing issues that were at the heart of the prior recall campaign. I reached out to Mercedes' corporate customer service, explained to them in writing that the same issues continue to exist (oxidization of the pin connectors which continue to cause tail lamp malfunction), showed them photos of clear oxidization of the pin connectors, and pleaded with them regarding the continued danger that is caused by the malfunctioning tail lamps. Despite the continuing clear defects and obvious dangerous conditions, Mercedes has refused to provide any assistance to repair the tail lamps. This is a serious design defect, and a quick google search confirms that it continues to be a widespread problem. At minimum, Mercedes should be pressed by the NHTSA to repair my tail lamps, free of cost. However, given that it appears that it continues to be a widespread problem that could potentially affect thousands of cars that continue to be road worthy, the NHTSA should investigate the extent to which Mercedes should be pressed to issue a second wider recall, because the first recall has not resolved the defects and dangerous conditions.
Electrical system, Exterior lighting, Air bags, May 8, 2026
I have messages on my instrument panel stating I have airbag malfunction going on I also have tail lights that are not working and after trying to replace the bulbs it still don't work so obviously it's the light bulb panel so I went and looked at recalls and says that these are all recalls on my car but that they were fixed. so I don't know why I have them all bad again so I need to know what to do
Electrical system, Exterior lighting, Other or unspecified, Jan 6, 2025
Check Right Tail and Brake Lamps warning light will not go off for months. They are working fine but the light won't go off. Googling on MB World, it shows Mercedes is aware of this problem and a recall is needed to get it corrected being safety issue with warning lights not working properly. See all info. below from owners, conversations and work done by dealers, etc. People note it is a middle school education problem. Please alert me when the recall is confirmed to get this important problem fixed. [XXX] Thank you, [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Electrical system, Exterior lighting, Sep 4, 2024
Headlight harness on drivers and passenger side is melting and my lights are flickering. I was advised to night drive my vehicle at night, because it could start an electrical fire. This is caused by heat from the lights.
Electrical system, Exterior lighting, Service brakes, Aug 26, 2024
The contact owns a 2009 Mercedes-Benz C300. The contact stated while driving and activating the turn signals, the taillights were inoperable. Additionally, the contact stated while driving and depressing the brake pedal to come to a stop, the brake lights were significantly dimmed except for the third brake light. The vehicle was taken to the dealer, where it was diagnosed with electrical failure. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 14V177000 (Exterior Lighting); however, the VIN was not included. The manufacturer was notified of the failure and informed the contact that they could not assist because the VIN was not included in the recall. The manufacturer referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.
Engine and engine cooling, Exterior lighting, Sep 21, 2023
The contact owns a 2009 Mercedes-Benz C300. The contact stated while driving at an undisclosed speed, she became aware that the coolant level was low. The contact added coolant to the reservoir. The contact stated that the coolant reservoir burst open. The vehicle was towed to an independent mechanic who replaced the coolant and hose. The vehicle was taken to the local dealer but was not diagnosed or repaired. The vehicle was repaired, but the failure recurred. Additionally, the indicator lights became inoperable. The check engine warning light was illuminated. The contact stated the failure was associated with NHTSA Campaign Number: 22V168000 (Exterior Lighting, Electronic Stability Control, Engine and Engine Cooling). The manufacturer was contacted, but no assistance was provided. The failure mileage was unknown.
Engine and engine cooling, Exterior lighting, Electronic stability control (ESC), Sep 14, 2023
The contact owns a 2009 Mercedes-Benz C300. The contact stated that the coolant warning light was frequently illuminated due to low coolant. The vehicle was taken to an independent mechanic where the engine hose and other engine parts were replaced. Despite the repair, the coolant light returned soon after the initial repair. The contact then took the vehicle to a dealer where the failure was linked to NHTSA Campaign Number: 22V168000 (Exterior Lighting, Electronic Stability Control, Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.
Engine and engine cooling, Exterior lighting, Electronic stability control (ESC), Apr 27, 2023
The contact owns a 2009 Mercedes-Benz C300. The contact stated while driving approximately 65 MPH, the instrument cluster started flickering and the vehicle stalled. The contact stated that the power steering and brakes were operable. The contact pulled off the highway and shifted the vehicle into park(P). The vehicle failed to restart and was towed to the dealer. The vehicle was not yet diagnosed or repaired. The manufacturer had been informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 22V168000 (Exterior Lighting, Electronic Stability Control, Engine and Engine Cooling) however, the VIN was not included. The failure mileage was approximately 119,000.
Electrical system, Exterior lighting, Feb 15, 2023
While driving and when parked the headlights flicker on and off. I have no headlights while driving at night, during adverse weather conditions and during dawn hours. I could crash into other drivers, or they could crash into me because they can’t see me. When a parking bulb blows it fuses and melts everything together causing the replacement of the entire headlight unit, this has happened twice.
Exterior lighting, Oct 14, 2022
The contact owns a 2009 Mercedes-Benz C300. The contact stated while driving at an unknown speed, several unknown warning lights illuminated. The vehicle was taken to the dealer where it was diagnosed that the connector for the rear taillights was melted into the bulk assembly mount and needed to be replaced. The contact was then informed by the dealer of NHTSA Campaign Number: 14V177000 (Exterior Lighting) however, the dealer confirmed that the recall was previously completed. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was promised a call back however, the contact had not yet received a response. The failure mileage was approximately 93,000.
Engine and engine cooling, Exterior lighting, Electronic stability control (ESC), Jul 11, 2022
The contact owns a 2009 Mercedes-Benz C300. The contact stated that she had experienced several electrical failures with the vehicle including the power seat and power windows, the parking brake, the exterior lighting, and the air bag warning lights. The contact also stated that the vehicle would lose motive power and stall while driving at various speeds with several unknown warning lights illuminated. The dealer was notified of the failure but offered no assistance. Upon investigation, the contact linked that failure to NHTSA Campaign Number: 22V168000 (Exterior Lighting, Electronic Stability Control, Engine and Engine Cooling). The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 120,000.
Exterior lighting, May 10, 2022
I noticed my right tail light has completely went out and related damage to the brown wire connected to the entire casing. Per recall campaign: 2014050001; NHTSA RECALL NUMBER: 14V177, "Oxidation on the ground pin connector for the rear tail lamps of subject vehicles can result in a dimming of the tail lights or loss of tail lamp functions. The loss of a rear tail lamp reduces the rearward visibility of subject vehicles, especially with respect to turn signal illumination and may increase the likelihood of a rear end crash". I recently called a new certified Mercedes Benz dealership near me who states this recall has been closed, however, there is no specific indication on whether that was the right or left tail light. Regardless, a recall covers both whether it happens simultaneously or at different increments. My requested resolution: to simply acknowledge the recall to replace this time the right tail lamp. Especially since any wiring issues poses risk of shortage or fire.
Steering, Electrical system, Exterior lighting, Apr 29, 2021
MY VEHICLE CONTINUOUSLY GIVES ME WARNING/ALERT MESSAGES OF HEADLIGHT/SIGNAL/PARKING LAMP ISSUES. UPON INSPECTION AND TAKEN TO CERTIFIED, RELIABLE MERCEDES REPAIR SHOPS, LIGHTS ARE FULLY FUNCTIONING, YET ALERTS CONTINUE ON MY DISPLAY/DASH. MORE IMPORTANTLY THE ELECTRONIC STEERING LOCK (ESL) HAS FAILED ON MORE THAN ONCE COSTING VERY CONSIDRABLE AMOUNTS OF REPAIR BILLS, AND IT HAS HAPPENED WITHOUT WARNING, I PARKED THE CAR WHICH HAS BEEN PERFECTLY MAINTAINED AND WITH LOW MILEAGE, AND THE STEERING WHEEL LOCKS, MAKING IT ALMOST IMPOSSIBLE TO EVEN HAVE IT TOWED TO BE REPAIRED.
Exterior lighting, Seats, May 16, 2020
I PURCHASED THIS VEHICLE IN 2009 AND OVER THE YEARS I HAVE REPLACED BOTH FRONT HEADLIGHT ASSEMBLY, LEFT AND RIGHT AT THE COST OF $800.00 EACH. I WAS TOLD THAT A BULB BLEW FUSING THE WIRES TOGETHER RESULTING IN THE REPLACEMENT OF THE ENTIRE ASSEMBLY. THE DRIVER SEAT HEAD REST SIMPLY FELL APART.
Electrical system, Exterior lighting, Air bags, Jan 16, 2020
PASSENGER SEAT AIRBAG SENSOR NOT WORKING WHEN SOMEONE SITS ON THE SEAT ALSO PASSENGER SIDE ELECTRICAL SYSTEM NOT WORKING AND CAUSING THE PASSENGER SIDE LIGHTS TO STAY ON WHEN VEHICLE IS OFF AND MERCEDES DOES NOT WANT TO DO ANYTHING ABOUT AND SAYS IT IS OUT OF WARRANTY AND I NEED TO PAY TO HAVE THE WHOLE SYSTEM REPLACED
Steering, Exterior lighting, Jan 12, 2019
I HAVE CONTINUED TO HAVE LIGHTING ISSUES WITH FRONT, REAR, AND SIGNAL LIGHTING. I AM CONSTANTLY HAVING TO PAY TO REPLACE THESE LIGHTS EVERY YEAR. NOW MY POWER STEERING MALFUNCTION EBS LIGHT HAS COME ON. THIS IS JUST TOO MUCH. I JUST PAID $1300 FOR SERVICE B AND SOME OTHER THINGS THAT NEEDED TO BE REPLACED. I AM TIRED OF ALWAYS HAVING TO PAY TO REPLACE LIGHTS.
Exterior lighting, Dec 1, 2017
TL* THE CONTACT OWNS A 2009 MERCEDES-BENZ C300. THE CONTACT STATED THAT THE WIRE CONNECTING THE TAIL LIGHT ON THE DRIVER'S SIDE MELTED AND CAUSED THE TAIL LIGHT NOT TO WORK. THE TAIL LIGHT, BLINKER, AND BRAKE WARNING INDICATORS ILLUMINATED. THE DEALER WAS CONTACTED (MERCEDES-BENZ IN PLANO, TX, 214-473-5643) WHERE IT WAS STATED THAT THE FAILURE WAS A KNOWN ISSUE, BUT THERE WAS NO RECALL. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS UNKNOWN.
Exterior lighting, Air bags, Oct 27, 2017
"TAKATA RECALL" THERE ARE TWO RECALLS ON THE FRONT AIRBAGS ONE ISSUES IN FEBRUARY 11, 2016 AND THE OTHER MAY 25, 2016. I'VE TAKEN MY CAR IN SEVERAL TIMES FOR SERVICE AND INQUIRED ABOUT THE RECALL. AS OF TODAY THE REMEDY IS NOT AVAILABLE. THERE IS A FAULT SWITCH WITH THE HEADLIGHTS IN OFF POSITION THE LEFT RIGHT TURN SIGNAL FLASH WHEN THE KEYS ARE NOT IN THE VEHICLE. IT DRAINS THE BATTERY WHICH HAVE REPLACED TWICE. WE DETERMINED THAT IF WE KEEP THE LIGHT SWITCH IN AUTOMATIC POSITION IT DOES NOT HAPPEN.
Electrical system, Exterior lighting, Seats, Aug 19, 2017
2 YEARS AGO MANAGER TOLD ME THE WIRING OF THE HEAD LAMPS WAS MELTING BUT HE CAN ONLY REPLACE THE WHOLE UNIT( BOTH). I TOLD HIM THAT A CAR WITH 30000 MILS THIS SHOULD NOT BE HAPPENING. NOTHING HE CAN DO. THE CAR HAS STARTED TO BURN ON THE INSIDE , SMOKE COMES OUT OF THE ENGINE. CAR TRANSPORTS CHILDREN. TO AND FROM SCHOOL. EERY OTHER ONTH LAMPS BURN OUT, HAPPENING SINCE THE CAR WAS NEW. FINALLY WENT TO SHOP AGAIN TODAY AND THEY PUT IT ON PAPER. WIRE COATING FALLING APART, CAUSES BURN OUT OF LAMPS. THIS IS A HUGE DANGER AND SHOULD BE RECALLED NOT PAID BY USER. HAVE SENT 2 OTHER COMPLAINTS TO NHTSA WITH NO RESOLUTION. WHY????? ADDITIONALLY CAR HAS HAD TAIL LAMP PROBLEMS SINCE THE BEGINNING WITH ONE RECALL. ADDITIONALLY THE SEAT COVER OF THE DRIVER SIDE IS COMING APART IN PIECES SINCE YEAR 2. HOW IS IT POSSIBLE NO ACTION HAS BEEN TAKEN?
Exterior lighting, Jul 16, 2017
HEADLIGHT WIRES ARE CORRODED AND MELTED. THIS SEEMS SIMILAR TO THE TAIL LIGHT RECALL A FEW YEARS AGO THAT CAUSED A FIRE.
Exterior lighting, May 3, 2017
TL* THE CONTACT OWNS A 2009 MERCEDES-BENZ C300. WHILE OPERATING THE VEHICLE, THE TAIL LIGHTS WOULD ILLUMINATE DIMLY AND/OR SHUT OFF INTERMITTENTLY. THE LIGHT BULBS WERE REPLACED, BUT THE FAILURE CONTINUED. THE CAUSE OF THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 186,000.
Electrical system, Exterior lighting, Apr 29, 2017
THIS 2009 C300 WAS PURCHASED NEW FROM THE MERCEDES BENZ DEALERSHIP IN JACKSONVILLE FL AS A RETIREMENT GIFT FOR 20 YEARS OF NAVAL SERVICE. ABOUT A YEAR LATER I NOTICED THE DAYTIME RUNNING LIGHTS CONTINUOUSLY BLINKING DURING THE DAY. THE NEXT PROBLEM IS WITH THE FRONT HEADLIGHT UNITS EACH TIME A BLUBS BLOWS, IT FUSES EVERYTHING INCLUDING WIRES TOGETHER REQUIRING THE REPLACEMENT OF THE ENTIRE HEADLIGHT UNIT. THIS HAS HAPPEN THREE TIMES WITH BOTH THE LEFT AND RIGHT HEADLIGHT UNITS. THE DIFFERENCE IN PRICE IS $28.00 FOR A REPLACEMENT BLUB VISE $600.00 PLUS DOLLARS FOR THE ENTIRE UNIT. THE DEALERSHIP HAS NO PROBLEM CHARGING ME THE COST TO REPLACE A MANUFACTURES DEFECT AND SAFETY ISSUE. THERE SHOULD BE AN IMMEDIATE RECALL OF THIS UNIT.
Electrical system, Exterior lighting, Apr 25, 2017
SOCKETS FOR THE PARKING LIGHTS ABOVE THE HEADLIGHTS MELTED. KNOWING THAT SOMETHING SIMILAR WAS ADDRESSED WITH THE TAIL LIGHTS, SEEMS TO BE RELATED. THE TAIL LIGHTS MELTED THE CARRIER AND THE CABLES NOW THE SAME IS HAPPENING ON THE FRONT OF THE CAR. I AM NOT THE ONLY OWNER OF MB C300 EXPERIENCING A ISSUE. WE ARE CONCERNED THAT OUR CARS CAN CATCH UP ON FIRE.
Electrical system, Exterior lighting, Seats, Feb 1, 2017
SECOND WARNING REGARDING THE ELECTRICAL WIRING REGARDING THE FRONT HEAD LAMPS. THE WIRING IS BURNING UP AND IT WILL CAUSE A FIRE WITH DEADLY CONSEQUENCES. THIS CAR HAS HAD A RECALL BEFORE REGARDING THE WIRING OF THE BACK STOP LIGHTS, IF NOTHING IS DONE THERE WILL BE A FIRE. THE SEAT (FRONT) COVERING IS PEELING OFF, CO. SAYS ITS NORMAL. THIS IS MY 2ND REPORT AND THE SMOKE IS GETTING HEAVIER ALL THE TIME AND IT IS AFFECTING THE COMPUTER OF THE CAR FUNCTION. THE VEHICLE IS ALWAYS PICKING UP CHILDREN WITH MY WIFE. VERY DIFFICULT TO GET PHOTO, BUT IS VISIBLE ON BOTH SIDES OF THE FRONT HEAD LIGHTS. THERE HAS BEEN NO FIRE YET BUT THERE IS SMOKE.
Electrical system, Exterior lighting, Dec 24, 2016
THE WIRING TO THE HEAD LAMBS (BOTH) ARE BURNING UP, CAUSING A BURNT SMELL IN THE CAR, COMPANY SAYS TO BUY NEW HEAD LAMPS. THE ELECTRIC WIRE SYSTEM IN THE CAR HAS BEEN A PROBLEM SINCE THE BEGINNING. EVIDENTLY THE HEAT IN THE MOTOR AREA IS TO MUCH FOR THE QUALITY OF THE WIRING COVERS AND THEY CAUSE LAMP BURN OUT,AND BURN THE PLASTIC WIRE COVERING. CAR IS USED FOR PLEASURE HAS VERY FEW MILES. VERY HARD TO TAKE A PICTURE , TECH HAD A HARD TIME GETTING TO IT.