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. I am told this is a major fire hazard, therefore I have stopped using my car. This problem sooner or later will hurt someone until mercedes recalls and replaces the harness for the cars that they have on the road.
The worst 1993 Mercedes Benz 300 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical24
- Engine7
- Fuel system3
- Steering3
- Acceleration2
- Airbags2
- Seat belts2
- Body1
- Brakes1
- Tires1
- Visibility1
Specific symptoms reported on the 1993 Mercedes Benz 300
Recalls 1
Visibility
- What is wrong
- If one of the headlamp wiper arms becomes misaligned, the wiper balde can lodge in the groove under the headlamp. If the washers are activated with the wiper blade in the misaligned and lodged position, the washer pump will run continuously expelling all available fluid.
- Risk
- Pump operation in the absence of fluid can cause the pump to overheat and cause a vehicle fire.
- Remedy
- Dealers will replace the headlamp washer pump on these vehicles.
Recall number 96V175000 · Recall details
Technical service bulletins for the 1993 Mercedes Benz 300 2
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
1993 Mercedes Benz 300 fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 2.5L 5‑cyl | RWD | 23 | 30 | 26 |
| 3.5L 6‑cyl Diesel | RWD | 18 | 22 | 19 |
| 3.2L 6‑cyl | RWD | 14-17 | 18-22 | 15-19 |
| 2.8L 6‑cyl | RWD | 17 | 23 | 19 |
| 3.0L 6‑cyl | RWD | 14 | 21 | 16-17 |
| 3.0L 6‑cyl | 4WD | 15 | 19 | 17 |
What 1993 Mercedes Benz 300 owners say
Most recent owner complaints, unedited.
My wiring harness has failed on my 1993 300e mercedes benz the insulation come off wiring.
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.
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. Recently, the problem has gotten worse; today, the vehicle does not achieve any good acceleration nor is it very responsive when the gas pedal is pressed. Operation of the vehicle is seriously impaired at this time. So far, this problem has necessitated the replacement of a battery. I've been advised that the cost to repair this problem will be upwards of $2,000 due to the cost of the replacement harness, a part which is normally designed to withstand the entire lifespan of the vehicle.
1. Burning smell 2. Poor running fast idle to no idle 3. Bm never heard of the problem.
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. I have brought it in to my mechanic several times because of the hesitation and shorting that occurs - especially when I have the AC or heater running and have spent a significant amount of money on trying to remedy it by attempting to re-wrap the wiring but it only afforded me a temporary fix at best. The estimate I was given today was for $1,400 for the wiring harness and another $700 - $800 for the labor cost associated with it's install. From the number of similar anecdotal stories I have read online while researching this issue, I wonder why mercedes benz has not issued a recall on this obvious design defect.
Vehicle is 1993 mercedes 300e sedan. 1. Strange things go on with the electrical system 2. When unlocking key, sometimes the alarm will go on. 3. Check engine light will not go off even after repair was done. 4. Sometimes air blower will work, sometimes not. 5. Sometimes antenna will come up, sometimes not. This leads me to believe that the wiring harness might be affecting the car's electrical performance. I would hate to strip the harness to find out. But there are plenty of complaints now on this wiring harness problem. I wish that mercedes will do a recall and repair these cars.
1993 300e 3.2 m104 engine wiring harness disintergrating, wire insulation falls apart entire wiring harness wires even not exposed to heat damaged. Chronic problem all 3 of our mercedes have this problem the 300e the worst. I worked at mercedes and replaced these harness every week. This is very unsafe can result in fires, ECM failure, drivable issues, no start, and many more problems.
The engine wiring harness of my mercedes 1993 300e wires had disintegrated causing shortages on the wires. It is unbelievable mercedes with such high reputation on quality would ignore such failures on their part.
Fuel injector harness is dry rotted as seen in the images on this site. I just recently discovered that there is a major defect with the harness assembly due to poor workmanship this is certainly a manufacturing defect. Mercedes should replace the harness free of charge.
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Questions about the 1993 Mercedes Benz 300
Is the 1993 Mercedes Benz 300 reliable?
Owners have filed 39 complaints about the 1993 Mercedes Benz 300, 13.0 times a typical 300 model year.
What is the most common problem with the 1993 Mercedes Benz 300?
Electrical system, with 24 complaints, typically around 103,756 miles. Next is engine (7).
How many recalls does the 1993 Mercedes Benz 300 have?
1 recall, covering visibility.
What gas mileage does the 1993 Mercedes Benz 300 get?
Official estimates for the 1993 Mercedes Benz 300 range from 15 to 26 mpg combined. The most efficient version (2.5L 5-cyl, RWD) gets 23 city and 30 highway.
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