2003 Mercedes-Benz C-Class
Problems, recalls and owner-reported issues
Engine and engine cooling is the leading concern among 106 owner complaints filed for this model year. This is the 16th highest complaint count among 23 C-Class model years with reports.
Of the 2003 reports, 4 involved a crash and 5 involved a fire. 5 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints: electrical system
22 reports, newest first. Show all
Electrical system, Jan 29, 2026, fire
The secondary instrument fuse block located on the driver's side of the dashboard erupted in flame while the vehicle was being driven, endangering its occupant, causing significant damage to its interior, and resulting in a local law enforcement "traffic hazard" determination.
Electrical system, Air bags, Aug 6, 2024
The contact owns a 2003 Mercedes-Benz C320. The contact stated that the sunroof had failed to open, and the sunshade cover failed to close, causing the sunrays to penetrate the vehicle. The vehicle was taken to the dealer, where an unknown assessment was made. The vehicle was not repaired. Additionally, the contact stated that the horn was inoperable. The SRS warning light was illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with front driver's side air bag failure. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 124,000.
Electrical system, Jun 11, 2021
There is an open recall on my brand of Mercedes-Benz but my Vin number isn’t included it’s on the sunroof where it stays open or it could possibly fly off it gets off track or whatever happens well mine will not go down I have to manually open it or manually close it it is a safety issue because it will refuse to go down completely and will be shaking while I am driving it puts me and others at risk but the dealership is refusing to fix it under A recall even though my brand and type is included in the recall
Electrical system, Other or unspecified, May 14, 2021
MY PANORAMIC ROOF IS MALFUCTIONING AND IS SUCK SLIGHTLY OPEN WONT CLOSE OR BUDGE AND NOW I'M HAVING MULITPLE ELECTRICAL ISSUES MY LIGHTS ARE FLICKERING CIGARETTE LIGHTER DOESNT WORK MY AC WORKS SOMETIMES BUT THEN IT DOESN'T AND OTHER THINGS AS WELL. THERE IS AN OPEN RECALL ON THE PANORAMIC ROOFS WITH MY MAKE AND MODEL BUT MY VIN NUMBER ISNT SHOWING UP..
Electrical system, Exterior lighting, Fuel/propulsion system, Aug 31, 2017, crash
MERCEDES BENZ POSSIBLE RECALL / EXTENDED WARRANTY FOR FUEL SYSTEM... INVOLVING A C CLASS 2003 WITH SAME ENGINE AS THE E CLASS. THE CAR FUEL SYSTEM IS TOTALLY MESSED UP, WILL ONLY FILL A HALF TANK AND RUNS OUT OF GAS BECAUSE THE FUEL TANK SYSTEM IS NOT WORKING CORRECTLY. CAR WILL NOT FILL. ONLY ONE TANK TAKING AND SENDING FUEL APPARENTLY. DASH IS MESSED UP, LIGHTS OUT, FUEL SYSTEM TOTALLY MESSED UP. I ALMOST WENT OFF A CLIFF IN THE CAR, SLID BACKWARDS ON A HILLSIDE WHEN THE CAR RAN OUT OF FUEL UNEXPECTEDLY. NO GAS, NO POWER, MY CAR WENT BACKWARDS, BRAKES NOT WORKING, I WENT INTO A DITCH AND ALMOST INTO A STEEP HILLSIDE, VERY SCARY. A CAR BRANCH SAVED MY DEMISE, HOLDING THE TOP OF THE CAR AND KEPT ME FROM GOING DOWN INTO A RAVENE. DENT ON THE BACK ROOF IS STILL THERE. MERCEDES BENZ REFUSES TO ACKNOWLEDGE ANY PROBLEMS ALTHOUGH THE PROBLEM IS APPARENTLY PROLIFIC IN CARS THIS YEAR AND TYPE. SAME FUEL SYSTEM ON A C320 AS AN E320 SAME YEAR. SAME ENGINE TOO. MY MECHANICS ARE BAFFLED, NO ONE CAN FIX IT, MERCEDES SHOPS DON'T WANT TO HELP, NO ONE CAN HELP.
Electrical system, Fuel/propulsion system, Jun 8, 2017
I WAS DRIVING MY CAR AND IT SUDDENLY TURNED OFF ON ME. I TRIED TO START IT AGAIN BUT IT WOULD CRANK BUT NOT TURN ON. I HAD A LIL LESS THAN HALF A TANK OF GAS BUT THERE WAS NO GAS BEING DELIVERED TO THE ENGINE. AFTER INSPECTING THE FUEL SENDING UNIT I NOTISED THAT THE PLASTIC AROUND THE WIRE CONNECTOR PINS WAS A BIT MELTED AND THERE WAS A SMALL HOLE THAT WENT STRAIGHT TROUGH THE SENDING UNIT COVER. I REPLACED THE SENDING UNIT BUT THE MELTING STILL CONTINUES. IT SEEMS LIKE THE WIRE GETS TOO HOT AND THE PLASTIC MELTS AROUND THE PINS. IM AFRAID THIS CAN EVEN CAUSE A FIRE SINCE ALL THE FUEL IS JUST INCHES BELLOW IT.
Electrical system, Exterior lighting, Fuel/propulsion system, Oct 6, 2016
I BOUGHT THE CAR YESTERDAY, AND TODAY REALIZED THE CAR IS LEAKING FUEL, POOLING UNDER THE BACK SEAT AND SPILLING OUT UNDER THE CAR. THE PASSENGER HEADLIGHT WILL NOT WORK; WE TRIED 3 BULBS. THE PANEL DISPLAYS A MESSAGE STATING ONE OF THE TAG LIGHTS IS OUT, BUT IT ACTUALLY WORKS.
Electrical system, Air bags, Feb 22, 2016
TAKATA RECALL. CARS WITH THIS ISSUE SHOULD BE PART OF THE RECALL. I HAVE SAME EXACT PROBLEM AS THE 7TH COMPLAINER.CASE #10574681. SRS LIGHT CAME ON WITH 1 MALFUNCTION. THE RESTRAINT SYSTEM. I TOOK IT TO THE WORKSHOP TO HAVE THE SCAN CODES CHECKED. THE CODE READER SAID THAT THERE IS A PROBLEM WITH ONE OF THE AIRBAGS. THE MECHANIC THINKS THAT THE AIRBAGS ARE DISABLED. BUT THE OWNERS MANUAL SAYS THERE IS A POSSIBILITY THAT AN AIRBAG COULD GO OFF WHILE DRIVING. I JUST READ THAT MERCEDES INCLUDED 814000 VEHICLES IN THE RECALL. MY CAR IS NOT INCLUDED. I THINK THAT THIS CAR MIGHT NOT BE SAFE TO DRIVE. WOULD YOU PLEASE HELP OUT AND HAVE AN INVESTIGATION. THANKS IN ADVANCE.
Electrical system, Fuel/propulsion system, Mar 26, 2015
I DON'T KNOW THAT MY CAR WAS A RECALL AND WHEN I FIRST GOT IT MY GAS GAUGE WHEN OUT AND STUFF START TO GO BAD. THE CAR PLACE I PURCHASE THE CAR FROM KNEW ALL THIS STUFF AND DON'T INFORM ME AT ALL. I KNOW I BOUGHT A USED CAR BUT I WAS HOPE THEY WILL LET ME KNOW . NOW THAT MY WARRANTY UP THEY IS GIVING THE RUN ALWAYS . WHAT SHOULD ABOUT IT . SO WHEN I GO PUT GAS IN MY CAR I DON'T KNOW HOW MUCH GAS IT IS IN MY CAR BECAUSE MY GAS READ AND METER IN THE CAR DON'T WORK AND ALSO HAVE A SHORT IN IT. *TR
Electrical system, Exterior lighting, Air bags, May 3, 2014, fire
I WAS ALWAYS GETTING AN ERROR MESSAGE TELLING ME MY REAR LIGHTS WERE NOT WORKING. I EXPERIENCED AN ELECTRICAL FIRE IN MY TRUNK, WHICH CAUSED THE AIR BAGS TO DEPLOY AND THE ENTIRE LEFT SIDE OF MY CAR CAUGHT FIRE. THE CAR WAS TOTALED. CAR WOULD NOT START, TRUNK WOULD NOT OPEN. CAR WAS TOTALED BY DEALER AND INSURANCE COMPANY. I KNOW THERE IS A RECALL NOTICE FOR NEW C CLASS CARS, BUT BECAUSE OF WHAT I EXPERIENCED, I BELIEVE OLDER MODELS MAY ALSO HAVE THE SAME PROBLEM. *TR
Suspension, Electrical system, Seats, Mar 23, 2010
TL*THE CONTACT OWNS A 2002 MERCEDES C320. WHEN DRIVING OVER A POT HOLE OR BUMP IN THE ROAD AT SPEEDS OF 20 MPH AND HIGHER, THE CONTACT STATED THAT HE HEARD A LOUD "METAL TO METAL" NOISE COMING FROM THE FRONT OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE BUSHINGS WERE REPLACED UNDER THE FACTORY WARRANTY. FOUR YEARS LATER, THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT TECHNICIAN WHO REPLACED THE BUSHINGS FOR THE SECOND TIME AS WELL AS THE FRONT CONTROL ARMS. THE FRONT DRIVER'S SIDE POWER SEAT FAILED AND WHEN TAKEN TO THE DEALER, HE WAS ADVISED THAT THE DRIVER'S SIDE FRONT SEAT ELECTRONIC CONTROL UNIT WOULD NEED TO BE REPLACED. THE REPAIRS TO THE SEAT WERE MADE AT THE OWNER'S EXPENSE. THERE WERE NO RECALLS FOR THE FAILURE FOR HIS PARTICULAR YEAR, MAKE AND MODEL VEHICLE. THE RIGHT FRONT TURN SIGNAL ALSO FAILED. HE ATTEMPTED TO REPLACE THE BULB BUT TO NO AVAIL. WHEN THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT TECHNICIAN, IT WAS CONFIRMED THAT THE WIRING HARNESS WAS DEFECTIVE. THE MANUFACTURER WAS CONTACTED AND PROVIDED NO ASSISTANCE. THE FAILURE MILEAGE WAS 80,000 AND THE CURRENT MILEAGE WAS 87,000.
Electrical system, May 31, 2009
JUST LIKE OTHER REPORTS HERE - ELECTRICAL MALFUNCTION. 50K MILES. TOOK TO MB DEALER FOR ROUGH IDLE AT COLD START UP AND LOW SPEEDS; LOUDER THAN NORMAL IDLE AT START AND IN REVERSE. NO CHECK ENGINE LIGHT, NO ERROR OR PROBLEM INDICATED IN DASH AT ALL. SAME DIAGNOSIS - DEALER REPORTED CAM SOLENOIDS LEAKING ENGINE OIL INTO THE WIRING HARNESS SHORTING HARNESS COMPONENTS (O2 SENSORS ETC.), HIGH $$$ $3600-$4000 REPAIR. ISSUE SHOULD BE RESOLVED AND PAID FOR BY MB SINCE THIS IS KNOWN DEFECT THAT SEVERELY REDUCES THE DRIVE-ABILITY AND VALUE OF THE VEHICLE. *TR
Electrical system, May 21, 2009
CHECK ENGINE LIGHT ON, WITH OCCASIONAL POOR GAS MILEAGE, ROUGH RUNNING. WHEN ENGINE STARTS ROUGH, ENGINE STOP/RE-START GETS ENGINE TO IDLE/RUN PROPERLY. DEALER REPORTED CAM SOLENOIDS LEAKING ENGINE OIL INTO THE WIRING HARNESS SHORTING HARNESS COMPONENTS (O2 SENSORS ETC.), HIGH $$$ REPAIR. FIRST OCCURRENCE AT 57K MILES (JUST OUT OF WARRANTY). CONTACTED MB, NO CONCERN, TOO BAD FOR YOU. SPORADIC RED LED WARNING ABOUT GAS CAP, BLINKING INDICATOR IN FUEL GAUGE, STOP/RESTART ENGINE, GOES AWAY (ERROR NOT IN OWNERS MANUAL). CAR STILL RUNNING AT 78K MILES AND USUALLY 35 MPG DURING NORMAL COMMUTE SO FAR (WITHOUT REPAIR SO FAR, DO NOT HAVE TAIL PIPE EMISSION CHECK IN AREA YET, SO NOT MANDATED TO FIX MIL LIGHT ISSUE), CLEAR ECM CODES OCCASIONALLY, COME BACK AFTER 3 KEY CYCLES. STUCK WITH CAR THAT IS NOT WORTH FIXING TO HAVE SAME PROBLEM COME BACK. THIS CAM SOLENOID/WIRING HARNESS/O2 SENSOR/CHECK ENGINE LIGHT ISSUE SHOULD BE RESOLVED AND PAID FOR BY MB SINCE THIS IS KNOWN DEFECT THAT SEVERELY REDUCES THE DRIVABLILTY AND VALUE OF THE VEHICLE. *TR
Electrical system, Apr 24, 2009
CHECK ENGINE LIGHT LEAD TO ROUGH IDLING AND INABILITY TO DRIVE VEHICLE. 2003 MERCEDES BENZ C230 WITH 61,650 MILES ON IT. ALL CAM SENSORS, O2 SENSORS, MAF SENSOR, ENGINE WIRING HARNESS REPLACED WITH NECESSARY O-RINGS AT DEALER. CAR WAS LAID UP 5 DAYS AND AT A COST OF $2,500. *TR
Engine and engine cooling, Electrical system, Dec 29, 2008
2003 MERCEDES C240 STALLS IMMEDIATELY AFTER PROLONGED TURNPIKE TRAVEL ( 1.5 HOURS) AT EXIT RAMP TO AN ARTERIAL ROADWAY. THIS INCREASES REAREND ACCIDENT POTENTIAL. MERCEDES CHECKED VEHICLE BUT NO REPORT CODES INDICATED. SUGGESTED THAT IT MAY BE COMPUTER OF SENSOR RELATED. MERCEDES SUGGESTED PULLING OVER FOR 30 MIN. TO LET COMPUTER RESET. FIRST INCIDENT 12/17/08 SECOND INCIDENT 12/28/08. *TR
Electrical system, Nov 10, 2008
CAR SEAT AND STEERING WHEEL WOULDN'T ADJUST WITH THE KEY PUT IN THE IGNITION..THIS WENT ON FOR THREE DAYS...THEN THE CAR DIED..HAD TO GET A JUMP..THE SERVICE REP SAYS THE MODEL# 320 C HAS A PROBLEM WITH THE SEAT MODULE FAILING ON THE PASSENGER AND DRIVERS SIDE..WHEN THE CAR WAS JUMPED ALL ELECTRICAL WAS WORKING PROPERLY AND FIND...TOOK TO DEALER AND THEY INFORMED ME THAT YES THE PASSENGER SEAT MODULE WAS BAD AND ALSO NEEDED A NEW BATTERY..THEY ALSO STATED THAT THE DRIVERS SEAT MODULE COULD GO OUT WITHIN THE NEXT FEW MONTHS...THE CAR ONLY HAS 13,703 MILES ON IT AND THIS PROBLEM IS BEEN KNOWN TO MB USA YET IS NOT ADDRESSED. *TR
Electrical system, Aug 20, 2008
DURING THE FIVE YEARS WE HAVE OWNED THE CAR IT HAS HAD NUMEROUS ELECTRICAL PROBLEMS. ON AT LEAST 5 OCCASIONS ALL FUNCTION OF THE DASHBOARD WENT OUT WHILE DRIVING. WHEN THE CAR WAS RESTARTED EVERYTHING WAS FINE. SEAT CONTROLS HAVE BEEN REPLACED SEVERAL TIMES, AND THEY STILL OPERATE INTERMITTENTLY. THERE IS NO PROBLEM WITH THE BATTERY. THERE IS A SHORT SOMEPLACE, AND THE DEALER KEEPS SAYING THEY CAN'T FIX IT IF THEY CAN'T SEE IT. *TR
Electrical system, Aug 3, 2007
I OWN A 2003 MERCEDES C240 STATION WAGON WITH ABOUT 42000 MILES, A FEW DAYS AGO I OBSERVED SOME MESSAGES ON DASH WHICH SEEM TO INDICATE ALTERNATOR PROBLEM. MY VEHICLE HAS NOT BEEN HEAVILY USED AND I AM SURPRISED TO LEARN THAT A NEW ALTERNATOR MAY BE NEEDED, THIS BECAUSE A FRIEND WITH C CLASS SEDAN HAS HAD THE SAME ISSUE JUST 2 WEEKS AGO AND COST HIM $1500 TO REPLACE THE ALTERNATOR & BATTERY. I BELIEVE THERE MAY BE MANY MORE FOLKS THAT EXPERIENCED THE SAME SITUATION AND PROBABLY THE C CLASS MERCEDES ARE OUTFITTED WITH FAULTY ALTERNATORS AND INVESTIGATION MAY BE IN ORDER HERE. *JB
Steering, Service brakes, Hydraulic, Parking brake, Engine and engine cooling, Power train, Electrical system, Exterior lighting, Latches/locks/linkages, Vehicle speed control, Equipment, Oct 14, 2005
I AM THE OWNER OF A C-230 4 DOOR SEDAN VIN#[XXX]. I HAVE AN ISSUE THAT I WAS LOOKING INTO ADDRESSING WHEN ANOTHER MAJOR ISSUE JUST AROSE THAT I NEED HELP FROM THE MANUFACTURER WHO I HAVE CONTACTED BUT NOT RECEIVED A RESPONSE. 1) LAST WEEK I DECIDED TO QUOTE INSURANCE AND MAKE A CHANGE TO ALLSTATE. ONCE THEY PUT IN THE VIN# MAJOR ISSUES CAME. THE PRICE WAS WAY DIFFERENT THEN WHAT I WAS PAYING WITH MERCURY. TO MAKE THIS SHORT, AFTER TALKING TO MY BROKER AT MERCURY, IT TURNS OUT MY 4 DOOR HAS THE VIN# OF A 2 DOOR COUPE. I CALLED BEVERLY HILLS LTD WHERE I PURCHASED THE CAR NEW. THEY DID NOTHING. I HAVE THE ORIGINAL TEMP REGISTRATION FROM THE DAY I PURCHASED THE CAR NEW, AND THE DEALER TYPED COUPE NOT FOUR DOOR AND ON THE LEASE AGREEMENT. I DID NOT NOTICE THIS. HERE ARE MY ISSUES. THE COUPE IS MORE EXPENSIVE ON INSURANCE - I HAVE BEEN OVERPAYING SINCE 2/2003. 2ND, AM I PAYING A FAIR LEASE RATE IF THE VIN# IS FOR ANOTHER BODY STYLE. THIS CAR HAS BEEN NOTHING BUT NIGHTMARE TO DEAL WITH SINCE THE DAY I PURCHASED IT. IT HAS BEEN SERVICED 8 TIMES, TRANSMISSION WORK, 2 COMPUTERS, CAMSHAFT, NEW RADIO, IDLE ISSUES, BRAKE SYSTEM FAILED, AND SO ON. IT'S A COMPLETE LEMON. IT IS GOING IN NEXT WEEK AGAIN. I HAVE ONLY 21,000 ON THE CAR, AND DRIVE MY 2ND CAR MORE A 79 300SD MERCEDES AS IT IS MORE RELIABLE THEN THIS NEW CAR. I NEED SOMEWHERE, SOMEONE TO GO TO, ANY INFORMATION WOULD BE GREATLY APPRECIATED. THANKS SO MUCH, [XXX] - PHONE OR EMAIL *JB UPDATED 07/18/2012 *JS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Power train, Electrical system, Aug 28, 2005
MY MERCEDES-BENZ C-240 (2003 MODEL), HAVING LESS THAN 18500 MILES, SUDDENLY LOST POWER AFTER SOME 2-HOUR WORTH OF FREE-WAY DRIVING. AROUND NOON ON FRIDAY, 8/26/05, I WAS DRIVING SOUTH -BOUND ON I-15 PAST VICTORVILLE (CA), ABOUT 9 MILES PAST THE EXIT FOR ROUTE 18, WHEN MY C-240 SUDDENLY LOST POWER. AS I DEPRESSED THE ACCELERATOR, I FELT NO POWER AND THE RPM WAS DECREASING. IT FELT LIKE THE ENTIRE ENGINE-TRANSMISSION SYSTEM WAS SHUTTING DOWN. THERE WAS NO PRIOR WARNING. I MADE RIGHT TURN SIGNAL LETTING OTHER VEHICLES KNOW I WAS COMING OFF THE FREE-WAY. I MANAGED TO PULL OFF TO THE RIGHT SHOULDER SAFELY AND CAME TO FULL STOP ON THE GRAVEL. AT THAT TIME, MY DIGITAL ODOMETER READ "1 MALFUNCTION". USING MY CELL PHONE, I IMMEDIATELY CALLED THE MERCEDES HOTLINE. THE ROADSIDE ASSISTANCE REPRESENTATIVE, KRISTIN, ADVISED ME NOT TO DRIVE THE VEHICLE, EVEN AFTER THE "1 MALFUNCTION" SIGN BECAME "NO MALFUNCTION" A LITTLE LATER. MY VEHICLE WAS TOWED TO A MERCEDES-BENZ DEALER IN RIVERSIDE, SOME 50 MILES AWAY. AT THE DEALERS SERVICE DEPT, AFTER A BASIC CHECK INVOLVING COMPUTER AND ELECTRONICS, SOME FAULTY IDENTIFICATIONS WERE MADE, BUT IT WAS DETERMINED TO BE SAFE AND DRIVABLE. I DROVE MY VEHICLE HOME, PLANNING TO HAVE A MAJOR CHECK UP LATER. *JB
Service brakes, Hydraulic, Engine and engine cooling, Electrical system, Visibility, Equipment, Mar 31, 2004
CONSUMER DISAPPOINTED WITH HER PROBLEMATIC, UNRELIABLE AND POTENTIALLY UNSAFE VEHICLE. *PH THE WINDOW SEALS SCRATCHED THE GLASS TINT. THE RADIO RECEPTION WAS POOR AND THE KEYLESS ENTRY SYSTEM ONLY WORKED AT CLOSE RANGE. THE TECHNICIAN INDICATED THAT THE TINT WAS LIKELY THE CAUSE OF THE POOR RECEPTION AND INABILITY TO USE THE ENTRY SYSTEM AT FURTHER DISTANCES. THE DEALER INSTALLED SCRAPER SEALS TO ALLEVIATE THE SCRATCHING. THE VEHICLE SHUT OFF FIVE TIMES IN A 45 MIN PERIOD AND ALL THE SERVICE LIGHTS ILLUMINATED. THE VEHICLE WAS TAKEN TOT HE DEALER WHO DETERMINED THAT A CYLINDER HAD MISFIRED AND WATER WAS IN THE SPARK PLUGS. THE DEALER REPLACED HE CYLINDER HEAD AND ALL VALVES. THE BAS, ESP AND ABS LIGHT ILLUMINATED WHILE DRIVING. THERE WAS A LACK OF AIRFLOW POWER WHEN THE A/C WAS USED. THE VEHICLE HESITATED WHEN ACCELERATING. THERE WAS A STRONG MILDEW ODOR COMING THROUGH THE VENTS. CD SKIPPED WHEN TURNING CORNERS. A RATTLING NOISE COULD BE HEARD FROM THE ENGINE WHILE THE A/C WAS ON. *NM
Fuel system, Gasoline, Electrical system, Vehicle speed control, Oct 3, 2003
THE FUEL GAUGE FAILED TO FUNCTION. IT DIDN'T REGISTER THE CORRECT GAS LEVEL IN THE TANK. THE DIGITAL CONSOLE LIGHT MALFUNCTIONED. IT WOULD EITHER NOT ILLUMINATE WHEN THE VEHICLE WAS STARTED OR WHEN ILLUMINATED IT WILL SUDDENLY GO OUT. THE VEHICLE HESITATED UPON ACCELERATION WHEN DRIVEN FOR LONG DISTANCES. *NLM