AI DamageMercedes-Benz 300 Series: problems, complaints, bulletins
Summary for the Mercedes-Benz 300 Series across 6 model years: 53 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Electrical system 79% of all complaints
- 2 Engine and cooling 15% of all complaints
- 3 Fuel system 8% of all complaints
- 4 Powertrain 6% of all complaints
- 5 Vehicle speed control 4% of all complaints
- 6 Engine 2% of all complaints
- 7 Exterior lighting 2% of all complaints
- 8 Seats 2% of all complaints
- Electrical system: 42 complaints (79% of all).
- Engine and cooling: 8 complaints (15% of all).
- Fuel system: 4 complaints (8% of all).
- Powertrain: 3 complaints (6% of all).
- Vehicle speed control: 2 complaints (4% of all).
Symptoms owners describe
How many of the 53 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 | 42 | 0 | 0 |
| Engine and cooling | 8 | 0 | 0 |
| Fuel system | 4 | 0 | 0 |
| Powertrain | 3 | 0 | 0 |
| Vehicle speed control | 2 | 0 | 0 |
| Engine | 1 | 1 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Seats | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Structure | 1 | 1 | 0 |
| Suspension | 1 | 0 | 0 |
| Tires | 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.
I was going west on vineyard and 10th st, a car traveling (65mph) south on 10th st hit the passenger side door pushing the car into a pole damaging the left front end.
The explosion caused the tire treads to separate from both the inner and outer sidewalls. After the explosion, we could still see that the sidewalls were still attached to the rim. We were very fortunate that no one was injured from the explosion.
Engine of 1995 mercedes benz e320 station wagon misfired and stalled. Investigating the plugs and wiring harness found the harness had disintegrated and shorted out.
Racing idle, uncontrollable acceleration, stalling, check engine lights coming on and off. Replaced thousands $$ in parts only to find it is a well safety problem that no-one, including the nhtsa has the courage to address. Car is not drivable and require over $3,000 to replace the engine harnesses.
1993 300e experienced multiple intermittent check engine code failures, racing at idle, stalling, all of which resulted in costly repairs including replacement of maf , 02 sensor, hot air flow sensor, over voltage relay, several blown fuses, ignition coils, climate control amplifier.
One significant issue was that the vehicle would have sudden loss of power. On one occassion, while driving at highway speeds, the vehicle loss complete power and I had to react quickly to pull off the highway to safety.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other models of this make
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.