To read your codes, there is info in this link;
http://www.peachparts.com/shopforum/showthread.php?p=742563#post742563
...on some codes that may or not apply to your car,.. and on how to build a cheap code reader that will read your codes... if your car was produced for California ...
there are also schematics, 10 sheets, on how to read your codes (from the MB manual) in the links at the bottom of my sig line.
Best of luck. These emmissions falts can be tricky and or real simple.
