I have seen quite a few in the upper 200k mile range. I think that any of the Mercedes products will hold up well AS LONG AS THEY ARE SERVICED. My worst pet pieve is for someone to say what a junker their car is, and upon looking at the service history, you find only oil changes.
Oil changes alone will not keep a car running forever.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS