AI Damage2004 Mercedes-Benz 230: common problems
Owners of the 2004 Mercedes-Benz 230 filed 6 complaints with NHTSA, most often about engine and cooling and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- involving a crash
- 1
What fails most often
- 1 Engine and cooling 33% of all complaints
- 2 Powertrain 33% of all complaints
- 3 Air bags 17% of all complaints
- 4 Electrical system 17% of all complaints
- 5 Equipment 17% of all complaints
- Engine and cooling: 2 complaints (33% of all).
- Powertrain: 2 complaints (33% of all).
- Air bags: 1 complaints (17% of all), 1 of them with a crash reported by the owner.
- Electrical system: 1 complaints (17% of all).
- Equipment: 1 complaints (17% of all).
Symptoms owners describe
How many of the 6 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 | 2 | 0 | 0 |
| Powertrain | 2 | 0 | 0 |
| Air bags | 1 | 1 | 0 |
| Electrical system | 1 | 0 | 0 |
| Equipment | 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 contact does not feel safe in the vehicle since the air bags did not deploy.
Check engine light came on. Repair done to fix issue found as stated by mercedes park place tech in dallas tx - 'found engine control module sending incorrect signals due to oil damage. Also found air intake temp sensor with oil damage. Necessary to replace engine control module and intake temp sensor.
Was driving on expressway today 2/27/1980 when my 2004 mercedes 230 went from 65 to 35mph almost was killed by a semi truck behind me!!!! Looked online today to see if anyone else had similar problems well I went to one site over 200 complaints about the same problem.
Tl*- contact stated that while driving her 2004 mercedes benz c230 there were exhaust fumes entering the passenger compartment of from an unknown area. The fumes caused the contact to have a headache.
On all occasions, the check engine light came on. The vehicle is currently at the dealership, where they are attempting to find the cause of the problem.
The service dealer replaced the heater box twice after a week the odor returned. The fourth time this happened the service dealer finally stated it was corrosion in the air conditioning system. The padding underneath the air conditioner was replaced.
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 13,281 of 36,659 model years in the NHTSA data (top 36% most complained about).
On average one model year of the 230 has 4 complaints (7 years in the data). This year has 6, above average.
What to check before buying
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- 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 2004 Mercedes-Benz 230?
Owner complaints to NHTSA most often mention: engine and cooling, powertrain, air bags. Total complaints: 6. The most frequent symptoms in complaint texts: warning lights, check engine (33%), airbags did not deploy (17%), A/C or heater (17%).
How many service bulletins (TSB) were issued for the 2004 Mercedes-Benz 230?
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 2004 Mercedes-Benz 230 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 2004 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.