AI Damage2012 Mercedes-Benz C350: common problems
Owners of the 2012 Mercedes-Benz C350 filed 35 complaints with NHTSA, most often about air bags and engine. Details by component below, with sources.
Key figures
- Owner complaints
- 35
What fails most often
- 1 Air bags 77% of all complaints
- 2 Engine 6% of all complaints
- 3 Fuel/propulsion system 6% of all complaints
- 4 Suspension 6% of all complaints
- 5 Electrical system 3% of all complaints
- 6 Fuel system 3% of all complaints
- 7 Powertrain 3% of all complaints
- 8 Service brakes 3% of all complaints
- Air bags: 27 complaints (77% of all).
- Engine: 2 complaints (6% of all).
- Fuel/propulsion system: 2 complaints (6% of all).
- Suspension: 2 complaints (6% of all).
- Electrical system: 1 complaints (3% of all).
Symptoms owners describe
How many of the 35 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) |
|---|---|---|---|
| Air bags | 27 | 0 | 0 |
| Engine | 2 | 0 | 0 |
| Fuel/propulsion system | 2 | 0 | 0 |
| Suspension | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Visibility | 1 | 0 | 0 |
| Other | 1 | 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.
Brake line corrosion issues, related and reported along with the sub-frame assembly corrosion. After getting the sub-frame repaired XXX, corrosion and deformation of the tie rods and control arms caused vibration and noise at speed, and while cornering.
In addition, the contact stated that while driving the vehicle, the fuel odor was extremely strong, and the contact could not wind the windows down. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure.
My carâs left side rear subframe is cracked due to corrosion. I started hearing a weird noise a week ago, and my car suddenly veered to the left side when I pressed the brake. I almost crashed my car because the car moved to the left of the yellow line on the road.
The contact stated while driving at an undisclosed speed, the sunroof glass shattered and landed on the sunroof cover. There was no impact on the sunroof that could have caused the sunroof to shatter. The contact and his daughter did not sustain any injuries. The vehicle was not diagnosed or repaired.
The (RH) rear suspension forward link attach point on the rear Suspension Cross-Member (Mercedes-Benz P/N: 204-350-01-41), separated from the sub frame due to internal corrosion of the Suspension Cross-Member. Part available for inspection. 2.
Tl* takata recall. The contact owns a 2012 mercedes benz c350. The contact received notification of nhtsa campaign number: 19v010000 (air bags) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
1 year after receiving recall letter for takata airbag recall (phase 4). Mercedes benz of san diego still will not replace the airbag. They will not give a date. They provided a telephone # for mercedes corporate customer care.
On several occasions, the air bag warning indicator illuminated. The failure mileage was unknown. Vin tool confirms parts not available.
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 6,335 of 36,656 model years in the NHTSA data (top 17% most complained about).
On average one model year of the C350 has 28 complaints (13 years in the data). This year has 35, above average.
What to check before buying
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
Other years of this model
Questions and answers
What are the most common problems with the 2012 Mercedes-Benz C350?
Owner complaints to NHTSA most often mention: air bags, engine, fuel/propulsion system. Total complaints: 35. The most frequent symptoms in complaint texts: rust, corrosion (9%), windows, sunroof (6%), airbag warning light (3%).
How many service bulletins (TSB) were issued for the 2012 Mercedes-Benz C350?
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 2012 Mercedes-Benz C350 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 2012 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 2026-11-05.