2004 Mercedes Benz C320 problems, complaints & recalls
Most-reported problem areas: Fuel/Propulsion System (4) · Visibility (2) · Air Bags (2)
🧭 Reliability snapshot
Compared against other Mercedes Benz C320 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (3)
Visibility:sun/Moon Roof Assembly 2024-11-19 · campaign 24V874000 · 33,456 vehicles
Defect: 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.
Risk: A detached sunroof panel can become a road hazard, increasing the risk of a crash.
Fix: 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.
Visibility:sun/Moon Roof Assembly 2022-12-23 · campaign 22V954000 · 131,653 vehicles
Defect: 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.
Risk: A detached sunroof panel may become a road hazard, increasing the risk of a crash.
Fix: 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.
Visibility:sun/Moon Roof Assembly 2019-12-20 · campaign 19V918000 · 747,928 vehicles
Defect: 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
Risk: A detached glass panel can separate from the vehicle and become a road hazard, increasing the risk of a crash.
Fix: 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.
Service bulletins (50)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Structure:body 2026-08-06 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-07-14 · LI35.30-P-058566 · Service Bulletin/Repair Instructions
single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). the noise is heard once in each instance when changing direction of travel. note: sound file in attachment cause if the complaint is eliminated by experimentally loosening the outboard collar n
Visibility/Wiper 2026-05-19 · LI82.30-P-059239 · Service Bulletin/Repair Instructions
complaint there are several types of complaint about noises or poor windshield wiper wiping performance: a: wiper blades squeaking, chattering, shuddering b: the windshield is not wiped completely (streaking) c: during the downward movement water is pulled back onto the windshield from the a-pillar
Exterior Lighting 2026-04-16 · LI82.10-P-078301 · Service Bulletin/Repair Instructions
complaint headlamp, front fog lamp leaky or fogged. cause fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. it does not lead to any technical impairment of the headlamp. if a pressure compensation diaphragm is fitted in the housing cover, then the l
Showing the 6 most recent of 50 bulletins. Search all of them free at nhtsa.gov.
What owners report
2022-09-04 · Wheels“my right rear tire wares from the inside to the middle only the rest of the tire is good. i’ve had two blowouts because i can’t see that part of my tire without getting down on the ground to look at it. the part i see looks good. my tire seems to be kicked out a bit at the bottom. this is the only tire i have problems with. …”
2016-10-12 · Air Bags · 130,000 mi“tl* the contact owns a 2004 mercedes-benz c320. while driving approximately 50 mph, the driver side air bag deployed independently as the contact struck a pothole in the road. the vehicle was towed to a mechanic where it was diagnosed that the impact activated the air bag deployment. the vehicle was not repaired. the manufacturer was made aware of …”
2015-09-25 · Fuel/Propulsion System“i smelt fuel inside my car whenever my car would be filled to a full tank of gas and for a period of time until the fuel level dropped. my car started to drive funny and not accelerate normally then stopped all together. mercedes diagnosed it as a fuel system issue. i bought the parts at mercedes and had it repaired and then then received a …”
2015-07-21 · Air Bags · 69,000 mi · 💥 crash“tl* the contact owned a 2004 mercedes benz c320. while stopped, another vehicle crashed head on into the contact's vehicle. the air bags failed to deploy. the contact sustained knee, back, head, and shoulder injuries. while waiting on police and medical service to arrive, another vehicle crashed into the rear of the contact's vehicle and the air ba…”
2014-10-07 · Fuel/Propulsion System · 32,000 mi“my vehicle has the same problem as many other mercedes benz owners the fuel smell inside the cabin because a failure in the fuel sending units. *tr…”
2014-05-27 · Fuel System, Gasoline · 56,000 mi“tl* the contact owns a 2004 mercedes e320. the contact stated fuel fumes were emitted in and around the vehicle. the vehicle was taken to a dealer. the manufacturer was made aware of the failure. the failure mileage was 56,000 and the current mileage was 60,000. updated 8/27/14*cn updated 09/5/2014 *js…”
2014-01-16 · Fuel/Propulsion System · 96,000 mi“tl* the contact owns a 2004 mercedes benz e320. the contact smelled a strong gasoline odor coming from vehicle. the contact removed the rear seat and discovered that the driver's side rear wheel was filled with gasoline. the vehicle was taken to a mechanic, who diagnosed that the fuel pressure valves needed to be repaired. the vehicle was repaired.…”
2013-10-25 · Steering · 79,580 mi“tl* the contact owns a 2004 mercedes benz c320. the contact stated that while driving approximately 60 mph, the steering wheel became difficult to maneuver as the brakes failed to respond. the contact merged to the shoulder and powered off the vehicle, but was unable to restart the vehicle. the vehicle was towed to a dealer where the failure was un…”
2013-05-28 · Engine · 1,000 mi“tl* the contact owns a 2004 mercedes benz c320. the contact stated that while driving at various speeds, the vehicle stalled without warning. the contact mentioned that the failure occurred several times. the vehicle was taken to the dealer. the technician was unable to diagnose the failure. the manufacturer was not made aware of the failure. the v…”
2012-03-23 · Visibility“2004 mercedes benz c320. consumer writes in discontent regarding mercedes benz corporation and issues with headliner and rear sail panels that were not properly placed back in the vehicle. *tgw the windshield and rear glass were replaced several years ago because they were deemed defective. the consumer stated after the warranty work was completed…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.