1991 Mercedes-Benz 300 Electrical system Problems
- Complaints
- 3about this part
- Share
- 16%of 19 total for the year
- Median mileage
- 119,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the electrical system of the 1991 Mercedes-Benz 300, 16% of the 19 complaints for this model year. Where a mileage was given, the median is 119,000 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My 1991 300sl benz has had to have the engine wiring harness replaced per mb dealer because it's going bad and decomposing causing a potential fire problem. This after a no start problem and a month in the shop. And they not being able to find the cause. Now , after replacing the harness , they are still not able to find the problem. I have been told that the harness is a green wiring harness as required be germany to its auto makers in 1991-1996. The decomposing of the wiring causes a fire hazard and should be replaced under warranty.”
NHTSA complaint #10286243, filed 2009-10, 119,000 milesElectrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1999 | 2 | 33% |
| 1997 | 1 | 20% |
| 1996 | 2 | 25% |
| 1995 | 7 | 44% |
| 1993 | 24 | 62% |
| 1992 | 5 | 23% |
| 1991 | 3 | 16% |
| 1988 | 1 | 14% |
| 1987 | 1 | 3% |
| 1986 | 1 | 8% |
Other parts of the 1991 Mercedes-Benz 300
4 complaintsEngine cooling
4 complaintsBrakes
2 complaintsSteering
2 complaintsTransmission and drivetrain
2 complaintsVehicle speed control
2 complaintsFuel system
1 complaintsSeat belts
1 complaintsSeats
1 complaintsBody and structure
1 complaintsTires
1 complaints
← All problems reported for the 1991 Mercedes-Benz 300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology