Total Complaints
12 filings
MERCEDES-BENZ C-CLASS · model year
12 NHTSA complaints, 2 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2003MERCEDES-BENZC-CLASS carries 12 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 2 crashes, 0 fires, 2 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2003 C-CLASS is electrical system with 2 filings, followed by unknown or other (1) and power train:driveline (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 15 investigation files overlapping the 2003 C-CLASS. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
12 filings
Crashes Reported
2 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| ELECTRICAL SYSTEM | 2 |
| UNKNOWN OR OTHER | 1 |
| POWER TRAIN:DRIVELINE | 1 |
| ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR | 1 |
| EQUIPMENT:APPLIANCE:AIR CONDITIONER | 1 |
| VEHICLE SPEED CONTROL:ACCELERATOR PEDAL | 1 |
| ENGINE AND ENGINE COOLING:EXHAUST SYSTEM | 1 |
| FUEL SYSTEM, OTHER | 1 |
| AIR BAGS | 1 |
| SEAT BELTS | 1 |
| ENGINE AND ENGINE COOLING:COOLING SYSTEM | 1 |
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ C240. THE CONTACT STATED THE COOLANT WAS LEAKING FROM THE RADIATOR INTO THE TRANSMISSION. THE DEALER WAS CONTACTED AND INFORMED HER THAT SHE HAD TO FLUSH THE RADIATOR AND THE TRANSMISSION OR REPLACE THE TORQUE CONVERTER. IF THE FAILURE WAS NOT REPAIRED BY FLUSHING THE SYSTEM, THE TRANSMISSION WOULD NEED TO BE REPLACED FOR OVER $2,000 AT THE CONTACTS EXPENSE. THERE WEE NO RECALLS OR WARRANTIES RELATED TO HER VEHICLE. THE MANUFACTURER WAS CONTACTED BUT OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 70,000. UPDATED 08/31/11 *BF THE CONSUMER HAS TRADED THE VEHICLE. UPDATED 09/07/11.*JB
Mileage: 70,000
TL*THE CONTACT OWNS A 2003 MERCEDES BENZ C240. THE CONTACT STATED WHILE DRIVING 15 MPH THE VEHICLE IN FRONT OF HIM SUDDENLY STOPPED CAUSING HIM TO CRASH INTO THE REAR OF THE VEHICLE. THE PASSENGER SEAT BELT DID NOT HOLD THE PASSENGER IN THE FRONT SEAT WHICH CAUSED HER HEAD TO HIT THE WINDSHIELD. BOTH THE DRIVER AND PASSENGER SIDE AIR BAGS DID NOT DEPLOY. THE VEHICLE WAS DESTROYED. THE PASSENGER WAS TAKEN TO THE HOSPITAL FOR A HEAD INJURY. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED BY THE INSURANCE COMPANY. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 20,000. UPDATED 07/08/11 *BF
Mileage: 20,000
TL*THE CONTACT OWNS A 2003 MERCEDES BENZ C240. THE CONTACT STATED WHILE DRIVING 15 MPH THE VEHICLE IN FRONT OF HIM SUDDENLY STOPPED CAUSING HIM TO CRASH INTO THE REAR OF THE VEHICLE. THE PASSENGER SEAT BELT DID NOT HOLD THE PASSENGER IN THE FRONT SEAT WHICH CAUSED HER HEAD TO HIT THE WINDSHIELD. BOTH THE DRIVER AND PASSENGER SIDE AIR BAGS DID NOT DEPLOY. THE VEHICLE WAS DESTROYED. THE PASSENGER WAS TAKEN TO THE HOSPITAL FOR A HEAD INJURY. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED BY THE INSURANCE COMPANY. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 20,000. UPDATED 07/08/11 *BF
Mileage: 20,000
MY 2003 C240 MERCEDES PILOT BUSHING IS EXPERIENCING HEAVY OIL LEAK - THERE IS A CURRENT RE-CALL ON SAME ISSUE WITH OTHER MODELS. THE DEALER I USE TO SERVICE MY CARE, REFUSE TO REPAIR BECAUSE THEY SAID MY MODEL IS NOT INCLUDED IN THE RE-CALL. 2ND ISSUE - MY DRIVER SIDE DOOR HANDLE IS BROKEN BECAUSE OF MANUFACTURE DEFECTS . SOMETIMES HARD TO OPEN AND HAVE TO USE OTHER DOOR TO GET INTO CAR, DEALER REFUSE TO REPLACE THE DEFECT HANDLE WITH GOOD HANDLE. *TR
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
Mileage: 70,003
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
Mileage: 70,003
TL*THE CONTACT OWNS A 2003 MERCEDES C240. SHE STATED THAT HER VEHICLE WOULD NOT ACCELERATE FAST ENOUGH TO SAFELY MERGE IN AND OUT OF TRAFFIC. THE MANUFACTURER STATED THAT THEY WOULD BE UNABLE TO ASSIST HER AND THEY WOULD NOT ACCEPT THE EXTENDED WARRANTY. THE CONTACT STATED THAT SHE WOULD FILE A COMPLAINT WITH THE STATE ATTORNEY GENERALS OFFICE DUE TO HER VEHICLE BEING A LEMON. THE FAILURE WAS 77 AND THE CURRENT MILEAGE WAS 40,900.
Mileage: 77
WHILE DRIVING WITH A/C SET ON "AUTO" THE A/C SYSTEM WOULD SUDDENLY TURN OFF BY ITSELF AND WOULD TURN OF REPEATEDLY WHEN STARTED AGAIN. DURING SUCH EPISODES THE A/C WOULD ACT ERRATIC WITH FANS TURNING ON AND OFF AT DIFFERENT OUTLETS, CYCLES BETWEEN HEATING AND COOLING, AND MAKES HISSING SOUNDS. THIS WOULD OCCUR MANY TIMES A DAY ON A DAILY BASIS IN SUMMER WEATHER (EXCEPT WHEN THE CAR IS TAKEN TO THE DEALER, IT SEEMS). IT TOOK ABOUT 2 YEARS FOR THE DEALER TO FINALLY FIX THE PROBLEM SINCE THEY COULD NOT AVOID ADMITTING ITS EXISTENCE AFTER I HAD VIDEO TAPED THE MALFUNCTION AND SHOWED THEM THE VIDEO.. *JB
Mileage: 32,073
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
Mileage: 43,620
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,
Mileage: 18,300
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,
Mileage: 18,300
VEHICLE WAS DAMAGED WHILE BEING SHIPPED. *MR *SC *JB
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.