I was out cruising around tonight, and I came across a 1990 300SEL with 204k miles for $4000. The paint and leather interior look flawless, and didn't appear to have any leaks. My question now is, what are the major issues to look for on a car with this many miles? Would this be a car that would have issues with the wiring harness? I'm not as familiar with the ga$$ers as I am with the diesels.