NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
19 reportsClear category filter90,000 miles · Jul 12, 2011
Engine And Engine CoolingFire
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ C230. THE CONTACT STATED THAT THERE WAS AN EXCESS OF SMOKE COMING FROM THE TAIL PIPE, BLINDING THE CONTACTS VIEW OF VEHICLE FOLLOWING. THE VEHICLE THEN BEGAN TO LOSE POWER ABNORMALLY AND WAS MOVED FROM THE ROADWAY WHERE IT WAS TOWED TO THE DEALER. THE DEALER ADVISED THAT AN ENGINE VALVE…
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TL* THE CONTACT OWNS A 2003 MERCEDES BENZ C230. THE CONTACT STATED THAT THERE WAS AN EXCESS OF SMOKE COMING FROM THE TAIL PIPE, BLINDING THE CONTACTS VIEW OF VEHICLE FOLLOWING. THE VEHICLE THEN BEGAN TO LOSE POWER ABNORMALLY AND WAS MOVED FROM THE ROADWAY WHERE IT WAS TOWED TO THE DEALER. THE DEALER ADVISED THAT AN ENGINE VALVE HAD MELTED INTO TWO PIECES AND A PIECE OF THE VALVE WAS FOUND IN THE MANIFOLD. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE AND CURRENT MILEAGES WERE 90,000.
NHTSA ODI #10412018
68,000 miles · Mar 23, 2011
Engine And Engine Cooling
I HAVE 2003 MERCEDES BENZ C230. WHENEVER I WOULD START THE VEHICLE IT WOULD GIVE ME JERK OR MAKE NOISE AND FINALLY JUST BEFORE TAKING IT TO A DEALER IT STALLED. I HAD IT TOWED. THE VEHICLE WAS TAKEN TO A LOCAL SHOP, WHICH SUGGESTED THAT THE PROBLEM IS MUCH LARGER AND NEEDS THE ATTENTION OF THE MANUFACTURER AND HENCE TO TAKEN TO …
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I HAVE 2003 MERCEDES BENZ C230. WHENEVER I WOULD START THE VEHICLE IT WOULD GIVE ME JERK OR MAKE NOISE AND FINALLY JUST BEFORE TAKING IT TO A DEALER IT STALLED. I HAD IT TOWED. THE VEHICLE WAS TAKEN TO A LOCAL SHOP, WHICH SUGGESTED THAT THE PROBLEM IS MUCH LARGER AND NEEDS THE ATTENTION OF THE MANUFACTURER AND HENCE TO TAKEN TO THE DEALER. IT WAS DIAGNOSED AS THE TIMING CHAIN WAS DEFECTIVE AND THE LOCAL SHOP OWNER SAID THIS WAS A COMMON PROBLEM WITH THIS VEHICLE AND A SERIOUS PROBLEM WITH MAJOR COST TO FIX. THE MANUFACTURER WAS CONTACTED WHO DID NOT OFFER ANY ASSISTANCE. THE VEHICLE IS NOT REPAIRED AS THE COST OF FIX IS AS LARGE AS THE CARS CURRENT VALUE. THE FAILURE AND CURRENT MILEAGE IS 68,000. *TR
NHTSA ODI #10392666
92,000 miles · Feb 23, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2003 MERCEDES BENZ C230. THE CONTACT STATED THAT WHENEVER SHE WOULD START THE VEHICLE, IT WOULD JERK VIOLENTLY. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP WHERE IT WAS DIAGNOSED THAT THE CAM SHAFT SENSOR WAS LEAKING AND THE TIMING CHAIN WAS DEFECTIVE. THE MANUFACTURER WAS CONTACTED WHO DID NOT OFFER ANY …
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TL* THE CONTACT OWNS A 2003 MERCEDES BENZ C230. THE CONTACT STATED THAT WHENEVER SHE WOULD START THE VEHICLE, IT WOULD JERK VIOLENTLY. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP WHERE IT WAS DIAGNOSED THAT THE CAM SHAFT SENSOR WAS LEAKING AND THE TIMING CHAIN WAS DEFECTIVE. THE MANUFACTURER WAS CONTACTED WHO DID NOT OFFER ANY ASSISTANCE. THE VEHICLE WAS REPAIRED. THE VIN WAS UNAVAILABLE. THE FAILURE AND CURRENT MILEAGE WAS 92,000.
NHTSA ODI #10384138
97,000 miles · Nov 23, 2010
Engine And Engine Cooling
LEAK ON THE ANTIFREEZE COOLANT TANK WHERE THE THIN HOSE CONNECTS TO THE COOLANT TANK ON TOP, THE STEEL TUBE THAT IS MOLDED INTO THE PLASTIC SLIPPED OUT AND THE PLASTIC PART CRACKED CREATING A LEAK. THE ANTIFREEZE MAY LEAK AND ACCUMULATE UNDER THE CAR, IT CAN DAMAGE THE ENGINE, ALSO IT CAN LEAK WHILE DRIVING CAUSING HAZARDOUS / …
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LEAK ON THE ANTIFREEZE COOLANT TANK WHERE THE THIN HOSE CONNECTS TO THE COOLANT TANK ON TOP, THE STEEL TUBE THAT IS MOLDED INTO THE PLASTIC SLIPPED OUT AND THE PLASTIC PART CRACKED CREATING A LEAK. THE ANTIFREEZE MAY LEAK AND ACCUMULATE UNDER THE CAR, IT CAN DAMAGE THE ENGINE, ALSO IT CAN LEAK WHILE DRIVING CAUSING HAZARDOUS / SLIPPERY CONDITIONS, ALSO CHILDREN OR PETS / ANIMALS MAY DRINK THE LEAKED ANTIFREEZE. THIS IS DANGEROUS. *TR
NHTSA ODI #10367247
75,000 miles · Jul 30, 2010
Engine And Engine Cooling
THE CAM SENSORS ON THE MERCEDES M271 ENGINE LEAK OIL WHICH SPREADS TO OTHER COMPONENTS VIA THE WIRE HARNESSES CONNECTED TO CAM SENSORS. OIL CONTAMINATION WILL DAMAGE OTHER ELECTRICAL COMPONENTS (NAMELY THE ECU AND EXHAUST OXYGEN SENSORS) IF THE CAM SENSORS AND WIRE HARNESSES ARE NOT REPLACED. A NEW CAM SENSOR AND WIRE HARNESS HA…
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THE CAM SENSORS ON THE MERCEDES M271 ENGINE LEAK OIL WHICH SPREADS TO OTHER COMPONENTS VIA THE WIRE HARNESSES CONNECTED TO CAM SENSORS. OIL CONTAMINATION WILL DAMAGE OTHER ELECTRICAL COMPONENTS (NAMELY THE ECU AND EXHAUST OXYGEN SENSORS) IF THE CAM SENSORS AND WIRE HARNESSES ARE NOT REPLACED. A NEW CAM SENSOR AND WIRE HARNESS HAS BEEN DESIGNED AS THE CORRECTIVE ACTION. THE DEFECTIVE CAM SENSOR AND WIRE HARNESS WERE USED ON THE PREVIOUS ENGINE DESIGN (M111). THERE IS A TECHNICAL SERVICE BULLETIN FOR M111 ENGINE BUT NOT THE M271 ENGINE. MERCEDES REFUSES TO RECALL THIS DEFECTIVE DESIGN ON THE M271 ENGINE CAUSING OWNERS TO PAY FOR THE $900 PREVENTATIVE MAINTENANCE. WITHOUT THIS REPAIR THE ECU (PART COST $2000) AND OXYGEN SENSORS (QTY 2 @ $238 EA) WILL BE EVENTUALLY DAMAGED AND WILL NEED TO BE REMOVED AND REPLACED. WITHIN THE PAST WEEK, PAID MORE THAN $ 2,400.00 TO REPLACE 2 CAM SENSORS, 2 OXYGEN SENSORS, AND WIRING HARNESS. REPAIR SHOP SAYS THAT THIS IS A DEFECT THAT MB HAS KNOWN ABOUT FOR YEARS. *TR
NHTSA ODI #10346318
71,145 miles · Sep 1, 2009
Engine And Engine Cooling
ENGINE HARNESS AND CAMSHAFT SOLENOIDS CONTAMINATED DUE TO LEAKING OIL WHICH SUBSEQUENTLY REQUIRED REPLACEMENT OF O2 SENSORS. *TR
NHTSA ODI #10282583
72,850 miles · Jul 12, 2009
Engine And Engine Cooling
C230K COUPE AT 73,000 MILES WITH SUDDEN VALVE GUIDES WORN BAD CYLINDER,COMPRESSION LOSS RECENTLY IN APRIL I WAS CALLED INTO MBZ FOR A RECALL ON A VACUUM HOSE, HERE I AM A FEW MONTHS LATER AND I'M DRIVING AND MY CAR STARTS SHAKING ,IDLING STRANGE AND THEN I TAKE IT TO A MECHANIC AND HE FIGURED IT AT FIRST GLANCE IT MAY BE WOR…
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C230K COUPE AT 73,000 MILES WITH SUDDEN VALVE GUIDES WORN BAD CYLINDER,COMPRESSION LOSS RECENTLY IN APRIL I WAS CALLED INTO MBZ FOR A RECALL ON A VACUUM HOSE, HERE I AM A FEW MONTHS LATER AND I'M DRIVING AND MY CAR STARTS SHAKING ,IDLING STRANGE AND THEN I TAKE IT TO A MECHANIC AND HE FIGURED IT AT FIRST GLANCE IT MAY BE WORN VALVE GASKET SEALS AND I SAID OK LET'S CHANGE THEM AND PUT IN NEW PLUGS TOO...THEN HE CHECKS THE COMPRESSION AND DISCOVERS THAT IT IS HALF OF WHAT IT SHOULD BE, WHAT? WHY SHOULD THE CYLINDER HEADS BE WORN AND NEED TO BE REPLACED FOR NEARLY $3000, ...THIS SEEMS TO BE HAPPENING TOO MANY OWNERS OF THIS MODEL ON HERE AND MBZFORUMS FOR THIS 2003-2005 YEARS. LOSS OF COMPRESSION IN ONE OR MORE CYLINDERS. THIS SHOULD BE RECOGNIZED BY MBZ AS A DEFECT AND SINCE WHEN DO THESE ENGINES FAIL AT 50,000OR EVEN 80,000? I FEEL THIS SHOULD BE PAID FOR BY THEM, THIS IS RIDICULOUS AND SHOULD NOT BE HAPPENING AT THIS MILEAGE!! DEFECT,FLAW IN DESIGN...THEY NEED TO STEP UP AND ADMIT IT AT MERCEDES HEADQUARTERS. PLEASE HELP US OWNERS , THEY ARE GETTING AWAY WITH THIS, MENTIONING VACUUM HOSE RECALLS ON THIS 2003 YEAR BUT SOME DEALERS HAVE RECOGNIZED THAT THESE ENGINES ARE DEFECTIVE AND A RECALL NEEDS TO BE DONE ON THESE VALVE GUIDES/CYLINDER HEADS. WHY IS IT THAT THERE IS AN INCONSISTENCY ON HOW THIS PROBLEM IS RECOGNIZED BY THE DEALER AND HANDLED. SOME ON THE FORUMS HAVE SAID THAT THE DEALER SCREWED THEM IF THE 50,000 WARRANTY IS OVER AND OTHERS HAVE HAD THE PARTS ONLY PAID FOR BY THE DEALER AND OTHERS HAVE HAD THE WHOLE THING PAID!! TOO MANY OF THESE C230K ENGINE CYLINDERS/VALVE GUIDES ARE GOING BAD, THEY ARE DEFECTIVE AND MBZ SHOULD BE CORRECTING THIS. I SHOULD NOT PAY $3000 TO REBUILD ENGINE THAT HAS BEEN MAINTAINED ON SCHEDULE AND FOR A CAR THAT IS AT ONLY 73,000 MILES THANKS *TR
NHTSA ODI #10276462
40,000 miles · Apr 2, 2009
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2003 MERCEDES BENZ C230. WHEN THE VEHICLE WAS STARTED, IT SHOOK UNCONTROLLABLY AND THE CHECK ENGINE INDICATOR ILLUMINATED. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THEY STATED THAT THE ENGINE OIL WAS LEAKING AND DAMAGED THE WIRING HARNESS AND OXYGEN SENSOR. THE REPAIR WOULD COST $2,000. THE MANUFA…
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TL*THE CONTACT OWNS A 2003 MERCEDES BENZ C230. WHEN THE VEHICLE WAS STARTED, IT SHOOK UNCONTROLLABLY AND THE CHECK ENGINE INDICATOR ILLUMINATED. THE CONTACT TOOK THE VEHICLE TO THE DEALER AND THEY STATED THAT THE ENGINE OIL WAS LEAKING AND DAMAGED THE WIRING HARNESS AND OXYGEN SENSOR. THE REPAIR WOULD COST $2,000. THE MANUFACTURER STATED THAT THE VEHICLE WAS OUT OF WARRANTY; THEREFORE, THEY WERE NOT RESPONSIBLE FOR THE REPAIR. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 40,000.
NHTSA ODI #10263954
65,000 miles · Sep 25, 2008
Engine And Engine Cooling
CHECK ENGINE LIGHT CAME ON. I TOOK IT TO THE DEALER AND THEY TOLD ME THAT THE O2 SENSOR NEEDS TO BE REPLACED, AND THE ENGINE HARNESS NEEDS TO BE REPLACED. THIS IS BECAUSE THE CAM SENSOR LEAKED AND PUSHED OIL INSIDE THE HARNESS AND NOW THERE IS OIL FLOWING IN THE HARNESS. THIS MEANS EVERYWHERE THERE IS A CONTACT OF THE HARNESS TH…
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CHECK ENGINE LIGHT CAME ON. I TOOK IT TO THE DEALER AND THEY TOLD ME THAT THE O2 SENSOR NEEDS TO BE REPLACED, AND THE ENGINE HARNESS NEEDS TO BE REPLACED. THIS IS BECAUSE THE CAM SENSOR LEAKED AND PUSHED OIL INSIDE THE HARNESS AND NOW THERE IS OIL FLOWING IN THE HARNESS. THIS MEANS EVERYWHERE THERE IS A CONTACT OF THE HARNESS THERE IS A POSSIBILITY THAT THERE IS OIL ON IT. THIS SEEMS TO HAVE BECOME A COMMON ISSUE NOW AND MERCEDES IS IGNORING IT. I HAVE NOTICED THAT I AM GETTING BAD MILEAGE BECAUSE OF THE BAD O2 SENSOR. THE IRONY IS THAT THE DEALER WILL FIX IT WITH THE SAME EXACT PART NUMBER ONLY TO HAVE IT LEAK AGAIN IN 4 YEARS. *TR
NHTSA ODI #10243482
53,000 miles · May 28, 2008
Engine And Engine Cooling
THE CHECK ENGINE LIGHT GOES ON, THE NEXT DAY I GO TO INDEPENDENT MERCEDES SHOP. THEY TELL ME MY O2 SENSORS ARE BAD. THE REASON THAT THEY ARE BAD BECAUSE OF THE CAM SENSOR AT THE TOP END OF THE MOTOR WAS LEAKING. THE WHOLE TIME IT WAS LEAKING I DIDN'T EVEN KNOW. THEN THE BAD NEW EVERYTHING HAS BEEN COATED IN OIL SUCH AS O2 SENSOR…
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THE CHECK ENGINE LIGHT GOES ON, THE NEXT DAY I GO TO INDEPENDENT MERCEDES SHOP. THEY TELL ME MY O2 SENSORS ARE BAD. THE REASON THAT THEY ARE BAD BECAUSE OF THE CAM SENSOR AT THE TOP END OF THE MOTOR WAS LEAKING. THE WHOLE TIME IT WAS LEAKING I DIDN'T EVEN KNOW. THEN THE BAD NEW EVERYTHING HAS BEEN COATED IN OIL SUCH AS O2 SENSORS THAT IS IT GIVES OUT THE CHECK ENGINE LIGHT. THE ENGINE HARNESS IS ALSO COATED IN OIL. *TR
NHTSA ODI #10229134
Official recalls
3Nov 19, 2024
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please see the recall report for a complete list of models and model years. The glass sunroof panel may not be properly secured and can detach.
Consequence & remedy
Consequence: A detached sunroof panel can become a road hazard, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the sunroof panel as necessary, free of charge. Owner notification letters were mailed January 10, 2025. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of previous NHTSA recall number 22V-954. MBUSA's number for this recall is 2024120001/2/3.
Dec 23, 2022
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2001-2011 C-Class, CLK, E-Class, and CLS vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The glass sunroof panel may not be properly secured and may detach.
Consequence & remedy
Consequence: A detached sunroof panel may become a road hazard, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the sunroof panel as necessary free of charge. Owner notification letters were mailed February 3, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall expands NHTSA recall number 19V-918. MBUSA's numbers for this recall are 2023010004, 2023010005, and 2023010006.
Dec 20, 2019
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2001-2011 vehicles. The bonding between the glass panel and the sliding roof frame may deteriorate, possibly resulting in the glass panel detaching from the vehicle. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V918-4126.pdf
Consequence & remedy
Consequence: A detached glass panel can separate from the vehicle and become a road hazard, increasing the risk of a crash.
Remedy: MBUSA will notify owners, and dealers will inspect the glass panel bonding and replace the sliding roof, as necessary, free of charge. The recall began July 10, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020040011.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗