How to tell, absent documentation, if M104 wiring replaced?
So . . . I'm out looking at a M104 300E or 300CE to purchase. If the seller does not have documented evidence, how does a semi-literate, uninformed purchaser tell if the engine wiring harness has been replaced? Exactly where, under the hood, do I look to see either cracked, original wiring, or if it has already been replaced? Thank you.