i have 2002 c230 coupe and im getting cold air only from the right side, ive tested the center ***** and they sim to be fine. another problem is that when the sun is really hot its allmos imposible to get cold air but as soon as the sun goes down and the out side temperature is 95o a get cold air and if the out side temperature is 70 I get cold air from both sides. Any body with this problem?

cheers

 

Had a very similar issue, and you can pinpoint this by looking at 2 things. It's either your duo-valve, or your AC Compressor. For your sake, I hope its the duo-valve, becuase not only is it easier to "get at," it is also much cheaper to replace than an AC Compressor.

My advice is to clean your duo-valve. How do yo do that? Follow this very detailed post with pictures. Should take you about 30 minutes.

http://mbclub.co.uk/forums/showthread.php?t=26888

 

found the answer to my problem, my system had a lick and i loose all mi freezon so they repair the lick and know everithing is perfect.