AI Damage2005 Mercedes-Benz C320: common problems
Owners of the 2005 Mercedes-Benz C320 filed 15 complaints with NHTSA, most often about engine and cooling and seats. Details by component below, with sources.
Key figures
- Owner complaints
- 15
What fails most often
- 1 Engine and cooling 27% of all complaints
- 2 Seats 20% of all complaints
- 3 Air bags 13% of all complaints
- 4 Electrical system 13% of all complaints
- 5 Exterior lighting 13% of all complaints
- 6 Engine 7% of all complaints
- 7 Powertrain 7% of all complaints
- 8 Steering 7% of all complaints
- Engine and cooling: 4 complaints (27% of all).
- Seats: 3 complaints (20% of all).
- Air bags: 2 complaints (13% of all).
- Electrical system: 2 complaints (13% of all).
- Exterior lighting: 2 complaints (13% of all).
Symptoms owners describe
How many of the 15 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine and cooling | 4 | 0 | 0 |
| Seats | 3 | 0 | 0 |
| Air bags | 2 | 0 | 0 |
| Electrical system | 2 | 0 | 0 |
| Exterior lighting | 2 | 0 | 0 |
| Engine | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Visibility | 1 | 0 | 0 |
| Other | 2 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While driving, my son was using the heated seat function and noticed a burning smell, the driver side seat was smoking, which burned a hole in the left hand side of the seat back and also burned a hole in the back of my sons sweatshirt.
The battery keep draining which make thhe car impossible to drive
I went to change my low beam headlight bulb and found the wiring insulation all flaking off to about six inches from the bulb connector. I searched on line and found others complaining of this same thing. I suspect since these wires are hidden inside the headlight assembly, the problem is much more common.
Luckily it did not get into my eyes and I stopped the vehicle safely at the side of the road only to find out that everything is intact and I did not hit any other object; however, my sunroof had exploded. I called the manufacturer, mercedes benz, and they refused to do anything about it.
I have got anythin g in mail I like to know if it's on the recall list the lights comes on and off srs..
Many phone calls to mercedes-benz dealer and the headquarter, they didn't try to resolve the issues I'm having with my car!!! Mercedes-benz wants people either forget about the safety issue! Die naturally or sell their cars.
There needs to be something done to eliminate the problem with headlights. Almost every auto manufacture is making there headlights out of material that clouds up after a couple of year. It is a safety hazard that has continued for more years than it should have.
Tl* the contact owns a 2005 mercedes benz c320. The contact stated that while driving, there was an overpowering burning odor present in the vehicle from the drivers seat. The contact then noticed that there was a quarter size hole that had burned through the contact's left pant leg. The contact was not injured.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 9,288 of 36,659 model years in the NHTSA data (top 25% most complained about).
On average one model year of the C320 has 27 complaints (7 years in the data). This year has 15, below average.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Seats. Occupant sensor, power adjustment, seat mounts.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Other years of this model
Questions and answers
What are the most common problems with the 2005 Mercedes-Benz C320?
Owner complaints to NHTSA most often mention: engine and cooling, seats, air bags. Total complaints: 15. The most frequent symptoms in complaint texts: smoke, burning smell, fire (20%), headlights and tail lights (13%), stalls while driving (13%).
How many service bulletins (TSB) were issued for the 2005 Mercedes-Benz C320?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2005 Mercedes-Benz C320 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2005 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.