AI Damage1986 Mercedes-Benz 300E: common problems
Owners of the 1986 Mercedes-Benz 300E filed 11 complaints with NHTSA, most often about air bags and fuel system. Details by component below, with sources.
Key figures
- Owner complaints
- 11
- involving a crash
- 1
What fails most often
- 1 Air bags 36% of all complaints
- 2 Fuel system 18% of all complaints
- 3 Powertrain 18% of all complaints
- 4 Seats 18% of all complaints
- 5 Engine and cooling 9% of all complaints
- 6 Seat belts 9% of all complaints
- 7 Steering 9% of all complaints
- 8 Suspension 9% of all complaints
- Air bags: 4 complaints (36% of all).
- Fuel system: 2 complaints (18% of all).
- Powertrain: 2 complaints (18% of all), 1 of them with a crash reported by the owner.
- Seats: 2 complaints (18% of all).
- Engine and cooling: 1 complaints (9% of all).
Symptoms owners describe
How many of the 11 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 | 4 | 0 | 0 |
| Fuel system | 2 | 0 | 0 |
| Powertrain | 2 | 1 | 0 |
| Seats | 2 | 0 | 0 |
| Engine and cooling | 1 | 0 | 0 |
| Seat belts | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Suspension | 1 | 0 | 0 |
| Tires | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Wheels | 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.
Whiile reaching into vehicle for a pocket book the strap pulled shift lever into gear while vehicle was parked with no key in it, causing vehicle to slip into gear and roll down hill. Dealer has been contacted.
Sudden acceleration syndrome. I believe I eliminated this problem by disconnecting the cruise control amp located under the dash board by unplugging cable attached to the unit. Was able to replicate the problem by reconnecting the attached cable. Believe cruise control systems design defective.
I just experienced my 4th fuel tank fracture over 5 years. The fractures occur in the surface of the tank not caused by wear of any sort. They just spontaneously occur. The tank is completely factory installed in the trunk of the car this allows fumes to enter the entire car. This is a very dangerous condition.
I have experienced hairline crack failures in three (3) separate fuel tanks placed into my 1986 mercedes 300e 4 door sedan over 6 years. These cracks never allowed liquid to escape, but fumes did repeatedly emit into the car trunk and passenger cabin.
Blowout, with 4/32 tread left, of schwab z800 ultra radial with 100,000 mile warranty, at approx 50,200 miles, occurred as driving at normal speed on freeway with no impact or prior damage to tire. 11/27/2004. Tires purchased 6/29/99 as pair. Rotated and kept properly inflated, wheels aligned.
While driving 55 mph driver's air bag deployed without a collision occurring, cause unknown. Please give any further details.
False deployment of air bag resulting in injuries (burns) to face and chest and damages to vehicle.
Right front wheel became separated at the ball joint and the tie rod broke off causing wheel to become loose. (ohio state police report).
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 10,521 of 36,659 model years in the NHTSA data (top 29% most complained about).
On average one model year of the 300E has 8 complaints (5 years in the data). This year has 11, above average.
What to check before buying
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Fuel system. Fuel smell, leaks, rough running, fuel-system codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Seats. Occupant sensor, power adjustment, seat mounts.
Other years of this model
Questions and answers
What are the most common problems with the 1986 Mercedes-Benz 300E?
Owner complaints to NHTSA most often mention: air bags, fuel system, powertrain. Total complaints: 11. The most frequent symptoms in complaint texts: unintended acceleration (9%), tires: bulges, blowouts (9%).
How many service bulletins (TSB) were issued for the 1986 Mercedes-Benz 300E?
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 300E 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 2026-11-06.