2008 Mercedes-Benz C 300 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2008 Mercedes-Benz C 300, 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
- Airbags27030.0%
- Electrical22925.5%
- Steering13615.1%
- Exterior lighting10711.9%
- Engine343.8%
- Driver assistance242.7%
- Seat belts232.6%
- Brakes182.0%
- Powertrain (other)161.8%
- Suspension121.3%
- Body & structure91.0%
- Other / unspecified60.7%
- Interior & seats60.7%
- Tires & wheels50.6%
- Fuel system20.2%
- Visibility20.2%
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
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
The airbag headrests opened up randomly without being involved in an accident!
The contact owned a 2008 Mercedes-Benz C300. The contact received notification of NHTSA Campaign Numbers: 16V081000 (Air Bags) and 16V363000 (Air Bags) and would like to be removed from the recall distribution list. The local dealer was not contacted. The manufacturer was contacted.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
The contact owns a 2008 Mercedes-Benz C300. The contact stated while at the car wash and attempting to wash the vehicle, there was popping sound coming from the vehicle, and the contact saw smoke coming from the speakers and called the Fire Department however, no damages were found. The vehicle was taken to the residence and an independent mechanic inspected the vehicle but found no issues with the vehicle. The trunk was opened, and the contact became aware of water inside the taillight housings. No warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 180,000.
The contact owns a 2008 Mercedes-Benz C300. The contact stated that upon turning off the vehicle, there was an abnormal clicking sound coming from the vehicle. There was no warning light illuminated. The contact stated that the following day, the vehicle failed to start after several attempts and required a jumpstart. The contact replaced the battery; however, the failure persisted. The contact disconnected the battery to prevent the battery from draining. The dealer and the manufacturer were not yet notified of the failure. The vehicle was not repaired. The failure mileage was approximately 200,000.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
On [XXX] the car refused to start due to the electronic steering lock failure. The car was towed to the nearest Mercedes Benz Dealer at Stevens Creek Blvd, San Jose CA 95129. An inspection was done and Mercedes Benz wanted $3457.66 to replace the Steering Lock. This item is a recall item in other years of the C300 Mercedes Benz. Google shows: Mercedes-Benz has issued a recall for the Mercedes- Benz C-Class models, including the C300, due to potential steering lock issues. The recall specifically affects 2015- 2016 C300 models, as well as other C-Class variations like the 2017-2019 C300 Cabrio and Coupe. The recall is due to a potential problem with the Electronic Steering Lock (ESL) module, which is responsible for locking and unlocking the steering wheel. A faulty ESL module can prevent the steering wheel from unlocking, causing the vehicle to be unable to start. We feel that the recall should also apply to the C300 2008 model as it is exactly the same issue and completely incapacitates the car and is a danger to the public as involves the electronic steering. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2008 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the steering wheel failed to turn in the intended direction. The contact stated that a message to remove the ignition key was displayed. The vehicle was driven to the residence. The contact stated that later, while starting the vehicle, the vehicle failed to start as intended. In addition, the contact stated the steering wheel had seized. The contact inspected the battery and determined there was no failure with the battery. The vehicle was taken to the dealer; however, the vehicle was not diagnosed. The contact was requested to pay a diagnostic fee and declined. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to take the vehicle to the dealer for a diagnostic test. The failure mileage was approximately 90,000.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
The contact owns a 2008 Mercedes-Benz C300. The contact stated while at the car wash and attempting to wash the vehicle, there was popping sound coming from the vehicle, and the contact saw smoke coming from the speakers and called the Fire Department however, no damages were found. The vehicle was taken to the residence and an independent mechanic inspected the vehicle but found no issues with the vehicle. The trunk was opened, and the contact became aware of water inside the taillight housings. No warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 180,000.
The vehicle has been loosing power during driving. Acceleration will die, then power will return. In addition exterior lighting will also malfunction or not work. As well ans other items associate with power or the unit that controls the power of those items After taking the vehicle in multiple times we had been told and looked up about the recall. Multiple are in place but the recall regarding the electrical/ power train / lighting r/t units in place and this recall sounds spot on with issues the vehicle is having .
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
The contact owns a 2008 Mercedes-Benz C300. The contact stated while driving 45 MPH and depressing the accelerator pedal, the vehicle slowed down independently and lost automotive power. The contact stated that the vehicle remained in the intersection while awaiting tow services. The contact stated that her boyfriend and son helped to push the vehicle to the right side of the roadway. The contact smelled a burning odor but was unsure where the odor was coming from. No warning light was illuminated. The contact stated that an independent mechanic was contacted. The vehicle was towed to an independent mechanic where it was diagnosed that the ECU was damaged and needed to be replaced. The vehicle was repaired. The contact related the failure to NHTSA Campaign Number: 24V704000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall. The manufacturer was not notified of the failure. The approximate failure mileage was 110,000.
The contact owns a 2008 Mercedes-Benz C300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. Additionally, the check engine warning light was illuminated. The vehicle was taken to the dealer where it was diagnosed with an intake manifold failure. The contact was informed that the intake manifold needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 152,151.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
NOTICED A RECALL FOR THIS PART
TOOK CAR IN FOR AIRBAG RECALL, WEEK LATER THE CAR WONT UNLOCK, HAD TO PAY $50 TO GET IN, WAS TOLD BATTERY HAD 12.4 AMPS, CAR WONT TURN OVER, ELECTRONIC SYSTEMS NOT ENGAGING, ALARM GOES OFF, REPLACED BATTERY $160CHECKED FUSES AND BOUGHT $25, NOTHING NOW HAVING TO TOW BACK TO MERCEDES BENZ OF CHANDLER THAT DID MY "RECALLS" OUT OF POCKET. THE RECALL SERVICE MESSED IT UP. THE EXACT THING AS IN COMPLAINT 212.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
Car has been in and out of the shop. Initially I have been contacting Mercedes about airbag messages and continued message of SRS Malfunction on dashboard. Airbags had been recalled and supposedly replaced on multiple occasions. This SRS continues to remain even after repair or being seen for this issue only for other components to have failed and me having to pay for those in the process. The SRS Malfunction remains an issue until the next issue is affected. Recently an entire Electronic SAM Module Component was replaced as the culprit only to have more issues and the SRS remained. Mercedes has contended that each time they saw the vehicle the the SRS Malfunction was not the problems while other documents were repaired such as battery and SAM. In the meantime since then the car has stalled, components that were working are no longer inoperable. There was a recall that was applied to only specific vehicles of my model year which state the SRS Malfunction was to be replaced and made whole. I never received one of those notices and I will note that my vehicle obviously was affected and should also have this component replaced as it fits the same model year and make of the issues Mercedes has repaired already on affected vehicles. This issue has been on going for several years and Mercedes has failed to rectify this component that makes it dangerous and causes safety concerns for us with the understanding that their note on their website about the SRS Malfunction appeared to me a cop out for them to not be responsible for the fix and recall thsr may have affected more vehicles than its originally accessed number. Instead of fixing this issue they continually find other repairs they indicate as the issue only to end up right back with the same SRS Malfunction and stalling issues with vehicle once again and want to use excuse of car's age as issue and failing to acknowledge and address the SRS Malfunction. Your system would not allow file upload. I can still provide
After repair done on the confirmed recall airbag computer/module my vehicle became immobile, malfuctioned. The vehicle warning lamps alerted the airbag malfunctioned, srs malfunction. I seeked service for repair of this recall by experts. This safety issue is still ongoing and urgency is needed for this to be resolved.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
The contact owns a 2008 Mercedes-Benz C300. The contact stated that while depressing the brake pedal, attempting to stop, the vehicle failed to respond as intended and causing the contact to drive through a stop sign, then merge onto the interstate independently. The driver's side rear tire was leaking brake fluid. The check brake system warning light illuminated. The vehicle was towed to a dealer, where it was diagnosed that the brake line was corroded. The vehicle was repaired under warranty for the subframe prior to the failure; however, the brake lines were not covered and needed replacement. The vehicle was then towed to an independent mechanic where the brake lines were pending replacement; however, the mechanic was waiting for parts. The manufacturer was notified of the failure and offered no assistance. The approximate failure mileage was 164,000.
Certified Mercedes dealership confirmed that the subframe of my 2008 C300 is rusted and needs to be replaced which is under warranty. However, they are unwilling and do not acknowledge that the brake lines are also rusted and need to be replaced which is CAUSED by the rusted subframe. I first consulted my local mechanic shop who specializes in Mercedes repairs, and he told me about the issues of the corroding subframe and the rested brake lines. He also mentioned that he has helped and directed many Mercedes owners to call Mercedes customer service to voice my concerns as well as confirm the warranty of the subframe.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
The vehicle has been loosing power during driving. Acceleration will die, then power will return. In addition exterior lighting will also malfunction or not work. As well ans other items associate with power or the unit that controls the power of those items After taking the vehicle in multiple times we had been told and looked up about the recall. Multiple are in place but the recall regarding the electrical/ power train / lighting r/t units in place and this recall sounds spot on with issues the vehicle is having .
TRANSMISSION LEAKS SO CAR STARTS SHIFTING HARD JERKING LEARCHING. MECHANIC SAYS IT IS A TORQUE CONVERTER SEAL THAT LEAKS SO NEEDS TO BE REPLACED. BUT HAVE TO PULL THE ENGINE & TRANSMISSION OUT TO SPLIT SO THE LABOR IS 22-23 HOURS LABOR WHEN THE PART IS ONLY LIKE $23 SO THE REPAIR BECAUSE OF THE LABOR WOULD BE ABOUT $2200 WHICH WE CAN'T AFFORD. THE MECHANIC FOUND SO MANY SAME VEHICLES WITH THIS PROBLEM THAT THERE SHOULD BE A RECALL. BUT OF COURSE THE DEALER WON'T REPORT BECAUSE THEY DON'T WANT TO HAVE TO MAKE THIS EXPENSIVE REPAIR TO SO MANY VEHICLES. WHILE DRIVING FAST OR SLOW ACCELERATING BREAKING TO SLOW DOWN, TAKING OFF AT A STOP SIGN STOP LIGHT GOING IN REVERSE ETC IT HESITATES TO GO INTO GEAR. KEEPS HAPPENING MULTIPLE TIMES A YEAR WE HAVE TO KEEP CHECKING CHANGING THE TRANSMISSION FLUID & GETTING IT TOPPED OFF.
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
My rear suspension, right lower control arm I believe it's called. Snapped out of the subframe do to corrosion . My hole rear subframe is getting worse, eating up by corrosion
My car has a rotten rear subframe and has holes in it and the dealer doesn't want to repair it and Mercedes announced that it had a 20 year extended warranty. I'm from Manchester, New Hampshire. They inspected it and say they can't change it for free. The warranty doesn't cover it. I don't know what's going on. with that
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
My car has 85,000 miles on it and the Rear Trailing Arm Frame on the drivers side has rusted from the inside out. It is a good thing I have become aware of this, as it was about to break and cause me to lose control of my car. This needs to be recalled before someone gets hurt. In Canada and Germany Mercedes is fixing this for free. Why have Americans not been warned about this potentially deadly safety issue? I am reading many common experiences of cars with less than 50,000 miles on them.
The contact owns a 2008 Mercedes-Benz C300. The contact stated that the vehicle was to a State Inspection Station to be State Inspected however while inspecting the vehicle the mechanic found severe corrosion and rust holes in the rear subframe of the vehicle. The contact was informed that the subframe needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 72,000.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
I HAVE A MB C300 2008 THE CAR NEVER HAD AN ISSUE UNTIL I BROUGHT IT IN FOR A AIRBAG RECALL 2 WEEKS LATER I GET AN SRS MALFUNCTION, ESP AND ABS FAILURE CAR DOESNT TURN ON NEXT DAY THE CAR TURNS ON AND ENGINE LIGHT GOES ON, THEN LIGHTS STAYED ON EVEN AFTER CAR WAS OFF NEXT DAY LIGHTS WENT OFF WHILE DRIVING IN DARK MAKING FOR HAZARDOUS AND QUITE SCARY SITUATION MB IS DOING THESE RECALLS BUT JEOPARDIZING THE OVERALL INTEGRITY OF CAR I EVEN REPLACED BATTERY BUT THIS STILL OCCURRED CAR WAS RENDERED UNDRIVABLE AND STUCK IN MY DRIVEWAY AND HAD TO HAVE IT TOWED AND PAY $380 JUST TO LOOK AT IT EVEN THOUGH I TOLD THEM THEY CAUSED DAMAGE THERE IS NO WAY A PERFECTLY RUNNING CAR COINCIDENTALLY HAS MAJOR ELECTRICAL ISSUES POST RECALL (THEY REPLACED ENTIRE STASH BOARD AND STEERING WHEEL COVER)
TAKATA RECALL I WAS HIT IN A HEAD-ON COLLISION WRECK IN OCTOBER 2018 MY AIRBAGS DID NOT DEPLOY AND I'VE BEEN UNDERGOING EXCRUCIATING PAIN PHYSICAL THERAPY PAIN MANAGEMENT AND WILL HAVE SURGERY ON MY SPINE SOON
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
What component or system failed or malfunctioned, and is it available for inspection upon request? The front passenger seat is not able to make adjustments. Seat has moved out of the rails, one side moves and the others does not move. How was your safety or the safety of others put at risk? Passengers are stuck in the front, not able to make any adjustments. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, they are saying that the frame of the seat that has been made by Mercedes is like a sheet metal and very very brittle. The shaft has been bent overtime and moves out of the motor. When it bends the shaft is shortened and will move only one of the sides. One side moves and the other side does not move. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Yes, it was inspected by the manufacturer but no action been taken. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? NO warning lights or anything.
When I was driving, the passenger active headrest suddenly deployed and pop out. I’m glad on one was on the passenger seat, and the airbags did not deployed. I’m concerned about the safety of airbags accidentally deploy in the future with the broken headrest.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Tires & wheels
Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.
From owner reports, verbatim
RIGHT FRONT TIRE WAS REPLACED AT 20K FOR BUBBLE THAT FORMED ON THE SIDE WALL AFTER HITTING SMALL POT HOLE; RIGHT FRONT TIRE NEEDS TO BE REPLACED NOW FOR THE SAME REASON. *TR
TL*THE CONTACT OWNS A 2008 MERCEDES BENZ C300. SHE HAD TO REPLACE FIVE TIRES. THE FIVE TIRES THAT WERE REPLACED ALSO INCLUDED THE NEW TIRE SHE USED TO REPLACED ANOTHER TIRE. THE FIRST INCIDENT OCCURRED ON MAY 14, 2008 WHILE DRIVING APPROXIMATELY 25 MPH MAKING A RIGHT TURN AND THE RIGHT REAR TIRE SIDE WALL SPLIT. AND ON MARCH 13, 2009 SHE HIT A POT HOLE AND NOTICED THAT THE RIGHT REAR FRONT AND LEFT TIRE FAILED AGAIN, THEY BOTH HAD A BUBBLE IN THEM. THE THIRD INCIDENT OCCURRED ON FEBRUARY 28, 2010. SHE HIT A POT HOLE AND AGAIN THE LEFT FRONT TIRE BLEW OUT. SHE WILL TAKE THE VEHICLE TO THE DEALER TO BE INSPECTED. THE TIRES THAT FAILED WERE MANUFACTURED BY CONTINENTAL, LINE CONTI PRO CONTACT, SIZE 225-45 R17 91H, DOT 65TYPXH6 ALL TIRES HAD THE SAME DOT NUMBER EXCEPT ONE DOT NUMBER WAS LM7RPXH6. THE VEHICLE FAILURE MILEAGE WAS 1 AND THE CURRENT MILEAGE WAS 25,000. SHE CONTACTED THE TIRE MANUFACTURER, BUT THEY DIDN'T OFFER ANY ASSISTANCE.
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.
From owner reports, verbatim
MY 2008 MERCEDES BENZ 300C STARTED THEN SHUT OFF IN MY DRIVEWAY. I HAD THE CAR LESS THAN 30 DAYS FROM PURCHASE. I CALLED THE DEALER AND HE CAME AND DID SOMETHING TO THE FUSE BAND IT START ED. NEXT DAY SAME THING, STARTED THEN SHUT OFF. I HAD IT TOWED TO MY MECHANIC, IT TOOK HIM TWO WEEKS TO FIGURE OUT WHAT WAS WRONG WITH IT. HE NARROWED IT DOWN TO THE IGNITION SWITCH. HOWEVER, HE WANT AUTHORIZED TO ACCESS THE IGNITION, SO IT HAD TO BE TOWED TO THE DEALER. THE DEALER CAME BACK AFTER 2 WEEKS AND SAID IT WAS THE FUEL PUMP. FINE, I PAID A LITTLE OVER $1K FOR THE DESPAIR. I GO TO PICK IT UP THEN I'M TOLD IT SHUT OFF. THIS IS AFTER A FULL DIAGNOSTIC TEST. MIND YOU, MY MECHANIC CALLED THE REP AT MERCEDES BENZ AND TOLD THEM EXACTLY WHAT THE ISSUES WAS AND THEY IGNORED IT. FAST FORWARD, I TELL THEM IN MY FRUSTRATION TO GO AND FIX THE CAR. I GET A QUOTE OF 878, AND THAT THEY WOULDN'T CHARGE FOR LABOR, PARTS ONLY. THEY CLAIM THE PARTS HAD TO BE ORDERED FROM GERMANY. TWO WEEKS LATER, A FULL MONTH AND A HALF OF WAITING FOR MY CAR, THE DEALER TELLS ME THE COST IS NOW 1919. LUDICROUS! THEY CLAIM THAT I NEEDED A KEY, THAT MY KEY WASN'T WORKING. WHAT? MY KEY WAS WORKING JUST FINE. THE C300 IGNITION ISSUES ARE OVERWHELMING AND NEED TO BE RECALLED. BUYER BEWARE!
MY CAR DID NOT RESPOND WHEN I TRIED TO START AND THE STEERING WAS LOCKED AND I COULD NOT FIRE THE IGNITION. I TOWED THE VEHICLE TO THE NEAREST MERCEDES SHOWROOM AND THEY SAID THAT THE STEERING WAS LOCKED AND SHOULD BE REPLACED WHICH WILL COST ME $1100. I HAVE READ COUPLE OF POSTS ONLINE AND I SEE THIS IS A KNOWN ISSUE AND IT IS REALLY BAD THAT MERCEDES DID NOT FIX THIS AND NOT EVEN TAKING CARE OF THE VEHICLES WHICH ARE EFFECTED.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
MY LCD NAVIGATION SCREEN DOES NOT TURN ON ANYMORE. IT RANDOMLY FLASHES WHEN I'M DRIVING AND CAUSES A DISTRACTION. AFTER SOME RESEARCH, IT SEEMS LIKE AN EXTREMELY COMMON ISSUE WITH MANY C300 MODELS OF THE 2008 YEAR. SOME OWNERS HAVE REPORTED SMOKE COMING OUT OF THE CORNER OF THE SCREEN.
TURN SIGNALS AND WIPERS / WINDSHIELD WASHERS CEASE TO OPERATE UNTIL CAR IS RESTARTED. WIPERS CONTINUE TO OPERATE IN RAIN SENSING MODE BUT NOT VIA THE WIPER CONTROL LEVEL. DEALER WAS NOT ABLE TO FIND ANY DIAGNOSTIC CODES AFTERWARD. FAILURE RECURRED A FEW DAYS AFTER DEALER INSPECTION, AND OCCURS SPORADICALLY BOTH IN URBAN AND HIGHWAY DRIVING. TIME BETWEEN FAILURE RANGES FROM HOURS TO MULTIPLE MONTHS. *TR
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
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .