[bmeister]

Sounds really familiar, quite a joy to replace if this is the case.
http://www.benzworld.org/forums/w202-c-class/1420434-codes-valve-bodies.html
Check out the last page or so. B

 

[bmeister]

See if the part has a # on it, if not call the dealer with vin # to verify, then you can shop around at your convenience. B