AI Damage2014 Mercedes-Benz C204.9: common problems
Owners of the 2014 Mercedes-Benz C204.9 filed 8 complaints with NHTSA, most often about electrical system and steering. Details by component below, with sources.
Key figures
- Owner complaints
- 8
What fails most often
- 1 Electrical system 38% of all complaints
- 2 Steering 38% of all complaints
- 3 Vehicle speed control 25% of all complaints
- 4 Air bags 13% of all complaints
- 5 Engine 13% of all complaints
- 6 Fuel/propulsion system 13% of all complaints
- 7 Structure 13% of all complaints
- Electrical system: 3 complaints (38% of all).
- Steering: 3 complaints (38% of all).
- Vehicle speed control: 2 complaints (25% of all).
- Air bags: 1 complaints (13% of all).
- Engine: 1 complaints (13% of all).
Symptoms owners describe
How many of the 8 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) |
|---|---|---|---|
| Electrical system | 3 | 0 | 0 |
| Steering | 3 | 0 | 0 |
| Vehicle speed control | 2 | 0 | 0 |
| Air bags | 1 | 0 | 0 |
| Engine | 1 | 0 | 0 |
| Fuel/propulsion system | 1 | 0 | 0 |
| Structure | 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.
The anti theft system failed after 59,000 miles, locke the steering wheel and won't allow the car to start. Mercedes charges 1,800 dollars to replace it.. Needs to be recalled very dangerous.
Sudden loss of power while trying to accelerate,engine light comes on and car goes into limp mode. Code p002. Car has 44450 miles.
The company has not been able to fix the airbags of my car because of the part is not available in the local dealership. This is my second complain to the nhtsa. My first was in 2018. It is sad that a safety issue by the company is not been taken care by the company even after 2 years.
My car all of the sudden jerked on the freeway and started shaking . I seriously thought we had an earthquake .. Then it accelerated and the next thing you know I'm going 25 miles and hour ..
Before repair - slow crank at start, some smoke when engine starting, check engine light came on.
Electronic steering lock system fails in every mercedes benz its a defective part.
There is a glass roof panel between the windshield and the sunroof. This glass panel is extremely brittle and shatters easily. This is my second time having to replace this glass panel. It is a dealer only part and costs $960 plus $300 for installation. The cost of this glass panel is extremely high.
Comparison
By complaint count this model year ranks 11,899 of 36,659 model years in the NHTSA data (top 32% most complained about).
On average one model year of the C204.9 has 5 complaints (4 years in the data). This year has 8, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
Other years of this model
Questions and answers
What are the most common problems with the 2014 Mercedes-Benz C204.9?
Owner complaints to NHTSA most often mention: electrical system, steering, vehicle speed control. Total complaints: 8. The most frequent symptoms in complaint texts: warning lights, check engine (25%), jerking, harsh shifts (13%), loss of power / limp mode (13%).
How many service bulletins (TSB) were issued for the 2014 Mercedes-Benz C204.9?
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 2014 Mercedes-Benz C204.9 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 2014 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.