Looking to replace a car that wiped out in the ice and found a 1992 400E with 140,000 miles on it.

I had a 1992 300D so I know a bit about the overall car, but is there anything I should look for that is 400E specific?

Engine wiring harness problems seem to be common on this car. Anything else I should know about?

There are no problems from a looks standpoint and everything seems to work. Still, I figured it might not hurt to get a few real world opinions.

Thanks!