I have a 2001 SLK320 which I purchased new. It now has 126,100 miles on it and despite a few issues when it was new (wiper not work, fuel gauge not working) the car has been great. Outside of regular maint. I had to replace the MAF at 60,000 and CPS at about 90,000.

The engine currrently burns about 1 quart of oil every 3,000 miles but this seems about normal with an engine of age and miles.

I have the 6 speed. The only negative I can say about the car is the interior (where the shift knob is) is painted on so it will chip.