It has come to our attention through owner reports and NHTSA complaints that 1995 model year Mercedes-Benz vehicles, specifically the E320 and potentially other models from this era like the C220, may be susceptible to wiring harness degradation. This issue appears to stem from the decomposition of the engine compartment wiring harness, potentially leading to significant operational problems.
Reports indicate that the insulation on these wiring harnesses becomes brittle and cracks over time, often around the 75,000 to 100,000 mile mark. This degradation can cause a range of electrical malfunctions, the most commonly reported being engine misfires and the illumination of the “Check Engine” light. In some cases, the severity of the issue necessitates complete replacement of the entire engine wiring harness.
One owner of a 1995 Mercedes-Benz E320 station wagon reported experiencing this exact problem around 75,000 miles. According to complaint number 10005396 filed with the NHTSA, a Mercedes-Benz dealer discovered the decomposing wiring harness during routine service. Shortly after replacement, the “Check Engine” light began to activate repeatedly. Further investigation revealed that the harness had frayed and was causing short circuits. The owner emphasized the potential safety implications of such a widespread defect and suggested a recall by Mercedes-Benz of North America to address these faulty wiring harnesses.
Another complaint, number 10007924, regarding a 1995 E320, similarly highlights the OEM wiring harness becoming brittle and cracking around 100,000 miles, directly resulting in engine misfires. While these complaints specifically mention the E320, related issues may also affect other Mercedes-Benz models from the mid-1990s, as indicated by a complaint (number 8009965) for a 1994 C220 mentioning repeated wiring harness replacements and unresolved root causes.
Owners of 1995 Benz vehicles, particularly E320 models and potentially C-Class vehicles from the same period, should be aware of this potential wiring harness issue. If you are experiencing engine misfires, erratic electrical behavior, or a persistent “Check Engine” light in your 1995 Mercedes-Benz, it is advisable to have your wiring harness inspected for signs of degradation. Addressing this issue promptly can prevent further complications and ensure the reliable operation of your vehicle.
