Can I get your thoughts on an S320 I'm considering?

[Mercedes Guy]

My local authorized MB dealer just got a 1995 LWB S320 in on trade. The vehicle only has 60,000 miles on it and the body and interior are in extremely good shape. It was a one owner car and always maintained at the dealership. I talked to the service advisor and he was able to go through the entire maintenance history.

Here are my concerns. The service advisor wasn't able to find any record of the wiring harness ever being replaced, even though the head gasket has already been replaced. I took it for a test drive and everything seemed to be in good order. The blue book value of the car is listed at about $11,300 and the dealer had it listed for $9,980. I made an offer that I never thought they'd accept, $8,800, but when I gave them that figure they immediately accepted it. I didn't know what to say, but I can't help but wonder if there could be a problem. Wiring harness? Transmission? A/C evaporator core? Abiding by the saying, "There's nothing more expensive than a cheap Mercedes." I decided not to go ahead with the deal. What are your thoughts on this situation? Thanks!