AI Damage1986 Mercedes-Benz 300: common problems
Owners of the 1986 Mercedes-Benz 300 filed 13 complaints with NHTSA, most often about air bags and vehicle speed control. Details by component below, with sources.
Key figures
- Owner complaints
- 13
- involving a crash
- 3
What fails most often
- 1 Air bags 62% of all complaints
- 2 Vehicle speed control 23% of all complaints
- 3 Seat belts 15% of all complaints
- 4 Electrical system 8% of all complaints
- 5 Powertrain 8% of all complaints
- 6 Service brakes 8% of all complaints
- 7 Structure 8% of all complaints
- 8 Tires 8% of all complaints
- Air bags: 8 complaints (62% of all), 2 of them with a crash reported by the owner.
- Vehicle speed control: 3 complaints (23% of all), 1 of them with a crash reported by the owner.
- Seat belts: 2 complaints (15% of all).
- Electrical system: 1 complaints (8% of all).
- Powertrain: 1 complaints (8% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3 L · petrol · 6 cyl
- 3 L · diesel · 6 cyl
- automatic, 4-speed
- manual, 5-speed
Drive: RWD
Symptoms owners describe
How many of the 13 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) |
|---|---|---|---|
| Air bags | 8 | 2 | 0 |
| Vehicle speed control | 3 | 1 | 0 |
| Seat belts | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Service brakes | 1 | 1 | 0 |
| Structure | 1 | 0 | 0 |
| Tires | 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.
Customer was driving and the driver side air bag deployed, please describe .
Vehicle suddenly accelerated 11 times, once resulting in loss of control and collision. No deployment of air bag during accident.
When the driver put the car in reverse it rolled backward very fast that the driver was pushing her brakes and the car would not stop.
While driving right rear tire blew out. The next day it was noted that other 3 tires had tread separation. Inspection revealed tires were defective.
Driver's airbag deployed while vehcle was in motion ,resulting in minor injuries.vehicle was not involved in a collsion. Manufacturer has been notified.
Automatic door locks failed, making it impossible to lock the doors.
Throttle bushing failed prior to recall (93v-095), causing inoperable gas pedal.
Vehicles throttle linkage broke while driving 2 times driver lost control of the acceleration. Tt
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 9,843 of 36,656 model years in the NHTSA data (top 27% most complained about).
On average one model year of the 300 has 9 complaints (22 years in the data). This year has 13, above average.
What to check before buying
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Seat belts. Belt pretensioners after airbag deployment, SRS codes.
- 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 1986 Mercedes-Benz 300?
Owner complaints to NHTSA most often mention: air bags, vehicle speed control, seat belts. Total complaints: 13. The most frequent symptoms in complaint texts: door locks, latches, handles (8%), rollaway, parking brake (8%), seat belts (8%).
How many service bulletins (TSB) were issued for the 1986 Mercedes-Benz 300?
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 1986 Mercedes-Benz 300 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 1986 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.