AI Damage1984 Mercedes-Benz 380: common problems
Owners of the 1984 Mercedes-Benz 380 filed 9 complaints with NHTSA, most often about structure and vehicle speed control. Details by component below, with sources.
Key figures
- Owner complaints
- 9
- involving a crash
- 3
What fails most often
- 1 Structure 33% of all complaints
- 2 Vehicle speed control 33% of all complaints
- 3 Electrical system 11% of all complaints
- 4 Powertrain 11% of all complaints
- 5 Suspension 11% of all complaints
- Structure: 3 complaints (33% of all).
- Vehicle speed control: 3 complaints (33% of all), 2 of them with a crash reported by the owner.
- Electrical system: 1 complaints (11% of all).
- Powertrain: 1 complaints (11% of all), 1 of them with a crash reported by the owner.
- Suspension: 1 complaints (11% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.8 L · petrol · 8 cyl
- automatic, 4-speed
Symptoms owners describe
How many of the 9 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) |
|---|---|---|---|
| Structure | 3 | 0 | 0 |
| Vehicle speed control | 3 | 2 | 0 |
| Electrical system | 1 | 0 | 0 |
| Powertrain | 1 | 1 | 0 |
| Suspension | 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.
Put on seat belt, restarted car, put foot on brake, & shifted into drive. Vehicle took off like a rocket, smashed through garage door, through structural beams & out the side of the building landing on the ground with front of car.
Car was idling into driveway, consumer put car in reverse, and it took off in reverse, like pedal was stuck. Consumer tried everything to stop vehicle, and consumer could not. Consumer landed in between two trees.
Vehicle suddenly accelerated causing frontend collision at high unknown speed crashing into 2 vehicles and median strip. Please describe details. Tt
Car: 1984 mercedes 380sl I was pulling into my driveway when I heard a clunk. I kept driving into my carport (garage), and I looked underneath to see if I could see anything. I had someone else look at it, and we discovered that the subframe that holds the lower a-arm was broken, and the a-arm hanging by only one end.
When the cruise control is activated, the car will suddenly accelerate to high speed by itself and the brake does not work. The only option is to shift to "neutral"and apply the brakes or switch -off the engine. It is most dangerous when you are in heavy traffic.
Dt: consumer found a recall online and contacted mercedes benz, and dealer,. They acknowledged the recall, but refused to reimburse the consumer for the repairs of the vehicle. The subframe broke, and he had it repaired before he found there was a recall. He had it repaired at a firestone.
I have a 1984 mercedes benz (mb) 380sl. This model is equipped with the exact same subframe that was installed on the mb 450sl models. The subframes for the 450sls were recalled because of the danger of it cracking and the left wheel collapsing under the car or coming off altogether while driving.
Consumer was informed on a recall on vehicle, but consumer's vehicle is not included due to vin.
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 11,366 of 36,656 model years in the NHTSA data (top 31% most complained about).
On average one model year of the 380 has 3 complaints (7 years in the data). This year has 9, above average.
What to check before buying
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- 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.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other years of this model
Questions and answers
What are the most common problems with the 1984 Mercedes-Benz 380?
Owner complaints to NHTSA most often mention: structure, vehicle speed control, electrical system. Total complaints: 9. The most frequent symptoms in complaint texts: A/C or heater (11%), knocking, grinding or other noise (11%), seat belts (11%).
How many service bulletins (TSB) were issued for the 1984 Mercedes-Benz 380?
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 1984 Mercedes-Benz 380 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 1984 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.