E420, I bought 2 cars from that dealer.
My first purchase was my 1988 560 sl with 44,000 original miles. The car turned out to be perfect. No accident damage, no paint work etc. Both my Mercedes indie and my body specialist in Michigan gave it an A+.
This year, I bought a 1995 E320 with 51,000 original miles from them. The experience was not as perfect as the first. The car has turned out to be perfect mechanically but they gave it the old cheap used car lot treatment before I arrived to pick it up

. The old lady who owned it since new parked it with "feeling" and there was some damage to the bumpers. They did an extremely lousy respray using the wrong color! I ended up with golden bumpers! needless to say, I had them resprayed to the correct color. Also, the passenger side had been badly resprayed from getting dented and scratched but it was not described in the details. An extensive detail job by yours truly has made the car look 90% perfect.
Items that were not working correctly but advertised as perfect were the sunroof and antenna. I fixed all the issues myself saving lots of $$$.
Do I regret the purchase? Not at all. the car looks perfect, almost. The interior is immaculate, and it should be with only 51,000 mile. I bought as my commuter/winter car.
My issue with some dealers is the crap they use to "shine up" the car for sale. Just leave as original so we can see what we are getting.