AI DamageMercedes-Benz 450: problems, complaints, bulletins
Summary for the Mercedes-Benz 450 across 4 model years: 5 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
| Year | Owner complaints | involving a crash | Technical service bulletins (TSB) | YouTube repair videos |
|---|---|---|---|---|
| 1977 | 2 | 0 | 0 | 0 |
| 1976 | 1 | 0 | 0 | 0 |
| 1974 | 1 | 0 | 0 | 0 |
| 1972 | 1 | 0 | 0 | 0 |
What fails most often
- 1 Vehicle speed control 60% of all complaints
- 2 Electrical system 20% of all complaints
- 3 Engine and cooling 20% of all complaints
- 4 Structure 20% of all complaints
- Vehicle speed control: 3 complaints (60% of all).
- Electrical system: 1 complaints (20% of all).
- Engine and cooling: 1 complaints (20% of all).
- Structure: 1 complaints (20% of all).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Vehicle speed control | 3 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Engine and cooling | 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.
There are thousands of this mercedes mdl from 1972 to 1982 (sl model) on the road. Help save someones life!, my auto was never in a crash or body damage! No safety defect mentioned in summary.
The gas pedal stuck and the car continued to accelerate in reverse. Please describe.
Cruise control; set the control to 60 mph try to take it off couldn't pull off the road and cut car off. Tt
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- 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.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
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.