Based upon what I learned and posted about a few months ago, I think a small number of the wires (the larger ones) in my 96 harness had the old insulation on them.

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1996 C280 289K Traded
1997 E420 167K Traded
2001 S430 240K Traded
2010 E550 4matic 80K
2000 GMC Jimmy 198K Gone to Boneyard
2003 Camry LE 196K
2011 Mazda3 i Sport 31K