2003 Mercedes Benz C320 problems, complaints & recalls
Most-reported problem areas: Electrical System (4) · Power Train (3) · Air Bags (3)
🧭 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 (49)
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 49 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-01-29 · Electrical System · 🔥 fire“the secondary instrument fuse block located on the driver's side of the dashboard erupted in flame while the vehicle was being driven, endangering its occupant, causing significant damage to its interior, and resulting in a local law enforcement "traffic hazard" determination.…”
2024-08-06 · Electrical System · 124,000 mi“the contact owns a 2003 mercedes-benz c320. the contact stated that the sunroof had failed to open, and the sunshade cover failed to close, causing the sunrays to penetrate the vehicle. the vehicle was taken to the dealer, where an unknown assessment was made. the vehicle was not repaired. additionally, the contact stated that the horn was inoperab…”
2023-07-13 · Visibility“the contact owns a 2003 mercedes-benz c320. the contact received notification of nhtsa campaign number: 22v954000 (visibility) however, the contact was advised by the dealer that he needed to open and close the sunroof to perform the recall however, if the motor failed the contact would pay for the repair of the motor. the contact called the manufa…”
2023-02-23 · Visibility:sun/Moon Roof Assembly · 105,000 mi“the contact owns a 2003 mercedes-benz c320. the contact stated that the moonroof made an abnormal sound and failed to open properly. the vehicle was taken to the dealer, where the moonroof was permanently sealed. the contact received nhtsa campaign number: 22v954000 (visibility) and the dealer confirmed that the vin was included in the recall; howe…”
2020-03-12 · Power Train · 36,000 mi“"check coolant level" level warning sign was on. apparently, there is leaking of coolant some where. it was at the water pump, which was replaced on june 20, 2019. it happens again now, about 9 months later.…”
2017-08-31 · Fuel/Propulsion System · 170,000 mi · 💥 crash“mercedes benz possible recall / extended warranty for fuel system... involving a c class 2003 with same engine as the e class. the car fuel system is totally messed up, will only fill a half tank and runs out of gas because the fuel tank system is not working correctly. car will not fill. only one tank taking and sending fuel apparently. dash i…”
2016-02-26 · Air Bags · 76,000 mi“the passenger side door handle is loose and the airbag srs light came on. the srs message said urgent go to market place.…”
2016-02-19 · Service Brakes · 70,000 mi“braking system failure my wife was driving to work. she attempted to stop at an intersection, her foot went to the floor while braking, red light and warn buzzer went off... no brakes. luckily and thank god, she avoided being t-boned in the intersection and was able to get it into a parking lot and down shift to use e-brake. the car has only 70,00…”
2014-10-16 · Air Bags · 50,000 mi · 💥 crash“tl* the contact owns a 2003 mercedes benz c320. the contact stated that while driving 35 mph, the contact crashed into the rear of another vehicle and the air bags failed to deploy. a police report was filed. the contact sustained head and chest injuries which required medical attention. the vehicle was destroyed. the manufacturer was notified of …”
2014-05-08 · Air Bags · 174,254 mi“tl* the contact owns a 2003 mercedes-benz c320. the contact stated that the supplement restraint sensor light illuminated. the vehicle was not diagnosed or repaired. the manufacturer was not notified of the failure. the failure mileage was 174,254.…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.