Date registered: Mar 2010
Vehicle: 1995 Mercedes-Benz S420 (W140), 1997 BMW 740iL (E38), 2011 C300 Luxury (W204)
Location: Sacramento, CA
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
As others have said, its mainly the heat that kills the insulators. I have found that the wiring throughout the car has been great, but my fuel injection one I can see the crumbling off at the plugs. I already ordered a new harness which is coming in today (although I have no issues with the engine performance, preventative maintenance). I don't think the wiring from the mirrors die due to constant moving in and out. If that is the case, your whole door harness will suffer the same issues because that is constantly being opened and closed.
People at the very top, Presidents not only of International companies-but of whole countries, travel S Class. -Jeremy Clarkson