Hope I'm not going to have this in my 1994 C180! The wires near the engine block look like they have insulation material hardening and cracking up. I have tried to recover the wires with some tape material and also block the nearest metal surface with a non-metallic shield so the wires won't touch it and get worse. In the meantime, all goes well! What would it cost(total) to change the engine harness??? Can the indie do it correctly or only a dealer can???