There are wires exposed at the end of the fuel injector plugs. What I did was I used a friction tape to cover the exposed wires and making sure the wires do not touch each other. I also retape the wiring harness with the same unsulation (friction tape) tape used by MB. By inspection the wires are bright copper in color and there is no sign of discoloration yet. But I will check the date code and re-examine the wiring harness again. Any other possibilities what causes the problem? I need help.
94 E320 Silver 210000 miles
94 740il Pewter Green 97000 miles- Retired
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07 Lexus IS250