1993 Mercedes-Benz 300 Electrical system Problems
- Complaints
- 24about this part
- Share
- 62%of 39 total for the year
- Median mileage
- 103,756miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 24 complaints about the electrical system of the 1993 Mercedes-Benz 300, 62% of the 39 complaints for this model year. Where a mileage was given, the median is 103,756 miles. 2 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My research indicate that this engine wiring harness problem is an ongoing issue for many mercedes benz, 300 e, and 300se cars with the twin cam engines made between the years of 1993-1995. Not only I am unable to have routine maintenance done, but I am told by the repair facility that this presents a safety problem, because there is a risk of fire associated with this defect.”
NHTSA complaint #10417754, filed 2011-08, 37,854 miles“The engine / fuel injection wiring harness of my 1993 Mercedes-Benz 300e has cracked insulation throughout and is beginning to short out with the risk of causing dangerous engine malfunction and even fire inside my engine compartment. I have read many reports of other Mercedes-Benz cars of the same age range having the exact same defect. …”
NHTSA complaint #10229661, filed 2008-06, 150,000 miles“I own a 1993 mercedes benz 300e. I noticed a section of the wiring harness underneath my hood back against the firewall has begun to deteriorate. The protective plastic on the wiring harness is cracking, exposing wire. Looks like a fire hazard. My car has stalled several times for no apparent reason, possibly related to the wire problem.”
NHTSA complaint #10155776, filed 2006-04, 90,000 miles“During normal operation of my vehicle, the vehicle began to act erratically. At start, the vehicle would not normally idle; instead it lurched between 500-1500 RPM. During operation, at a random points, the vehicle would not respond to pressing the gas, instead surging power until I stop and idle for a minute. It turns out that the problem is attributable to the wiring harness, which is disintegrating. This well-known problem is attributable to the use of inferior materials by Mercedes-Benz which are not suitable for use in high-temperature environments. …”
NHTSA complaint #10398067, filed 2011-04, 127,000 miles“The engine harness problem after owning my car since 1993. It is clear that the engine harness was made with biodegradable material which has now lost it's plastic covering over the metal wires. With wires exposed after the engine harness degration, the car which was supposed to last me for a long time, has become impossible to use. Without the proper harness replacement, the car is totally useless. Upon checking into this problem I have found out that every e300 built between 1992 and 1997 is built with the same harness. All these cars that are still on the road are having the same issue. …”
NHTSA complaint #10505881, filed 2013-04, 71,000 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 1993 Mercedes-Benz 300
7 complaintsFuel system
3 complaintsSteering
3 complaintsAir bags
2 complaintsSeat belts
2 complaintsVehicle speed control
2 complaintsBrakes
1 complaintsEquipment
1 complaintsOther or unknown
1 complaintsBody and structure
1 complaintsTires
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 1993 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