You are safer than newer M-B owners. Many reports that rodents find their corn-based bio-degradable wiring insulation tasty. Even without rodents, it has been degrading too soon on its own. Completely rewiring a modern car might cost $10K.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans