RoadVitals

2003 Mercedes-Benz C Class Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
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Latest Jul 11, 2011
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
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Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
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What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2003 Mercedes-Benz C Class, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Reports by component

Ranked by how many owner reports name each component category

  • Electrical327.3%
  • Engine218.2%
  • Driver assistance19.1%
  • Fuel system19.1%
  • Powertrain (other)19.1%
  • Airbags19.1%
  • Seat belts19.1%
  • Heating & air conditioning19.1%

Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.

Each component in detail

What the reports in each category say, in the owners' own words

Electrical

Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.

3
reports

From owner reports, verbatim

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

NHTSA ID 10253108 · filed Dec 29, 2008

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

NHTSA ID 10198454 · filed Aug 3, 2007

Too few reports in this category for a page of its own — they appear in the full complaint list.

Engine

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.

2
reports

From owner reports, verbatim

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

NHTSA ID 10411780 · filed Jul 11, 2011

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

NHTSA ID 10253108 · filed Dec 29, 2008

Too few reports in this category for a page of its own — they appear in the full complaint list.

Driver assistance

Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.

1
report

From owner reports, verbatim

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.

NHTSA ID 10198750 · filed Aug 7, 2007

Too few reports in this category for a page of its own — they appear in the full complaint list.

Fuel system

Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.

1
report

From owner reports, verbatim

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

NHTSA ID 10261485 · filed Mar 10, 2009

Too few reports in this category for a page of its own — they appear in the full complaint list.

Powertrain (other)

Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.

1
report

From owner reports, verbatim

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

NHTSA ID 10134422 · filed Aug 28, 2005

Too few reports in this category for a page of its own — they appear in the full complaint list.

Airbags

Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.

1
report

From owner reports, verbatim

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

NHTSA ID 10404062 · filed Jun 1, 2011

Too few reports in this category for a page of its own — they appear in the full complaint list.

Seat belts

Reports naming seat belts, buckles, retractors and pretensioners.

1
report

From owner reports, verbatim

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

NHTSA ID 10404062 · filed Jun 1, 2011

Too few reports in this category for a page of its own — they appear in the full complaint list.

Heating & air conditioning

Reports naming the heating, ventilation and air-conditioning system.

1
report

From owner reports, verbatim

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

NHTSA ID 10198649 · filed Aug 6, 2007

Too few reports in this category for a page of its own — they appear in the full complaint list.

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Elsewhere on this vehicle

Data sources

Data on this page last refreshed .