The 1995 Mercedes-Benz E320, a member of the esteemed W124 family, is celebrated for its robust engineering and timeless design. However, like many vehicles of its era, certain components can degrade over time. One recurring issue reported by owners of the 1995 E320 is problems with the engine wiring harness. Reports submitted to the National Highway Traffic Safety Administration (NHTSA) highlight concerns about the quality and durability of the original equipment manufacturer (OEM) wiring in these vehicles.
Several complaints detail a common theme: the decomposition of the engine compartment wiring harness. One owner reported discovering the issue during a routine 75,000-mile service. The Mercedes-Benz dealership identified that the wiring harness was decaying and required immediate replacement. Shortly after this initial discovery and partial repair, the “Check Engine” light began to illuminate repeatedly, signaling further complications. Upon further inspection, it was determined that the entire engine wiring harness needed replacement due to fraying and short circuits, notably within a valve cover area. This owner astutely pointed out the safety implications of such a widespread defect, suggesting it should be classified as a Class 1 safety issue. Their research indicated that numerous owners of Mercedes-Benz vehicles manufactured between 1994 and 1996 were experiencing similar problems with deteriorating wiring harnesses. This led to a call for a general recall to address and rectify these potentially hazardous wiring issues by Mercedes-Benz of North America.
Another complaint specifically mentions the OEM wiring harness in the 1995 E320 becoming brittle and cracking around the 100,000-mile mark. This degradation was directly linked to engine misfires, a serious performance concern. These accounts underscore a pattern of premature wiring harness failure in the 1995 Mercedes-Benz E320, often manifesting as brittleness, cracking, and subsequent electrical malfunctions.
While these complaints are specific to the 1995 Mercedes-Benz E320, another report in the NHTSA database involves a 1994 Mercedes-Benz C220 experiencing similar wiring harness woes. This owner faced the significant inconvenience of replacing the wiring harness three times, with the dealership unable to pinpoint a definitive cause or permanent fix. This broader context suggests that wiring harness degradation might be a more widespread issue affecting Mercedes-Benz vehicles from this period.
For owners and prospective buyers of a 1995 Mercedes-Benz E320, understanding these potential wiring harness issues is crucial. Regular inspection of the engine wiring harness is advisable, particularly for vehicles approaching or exceeding 75,000 to 100,000 miles. Symptoms such as a persistent “Check Engine” light or engine misfires could indicate underlying wiring problems. Addressing these issues promptly can help maintain the reliability and safety of your classic Mercedes-Benz E320.
