| Hi, I have a used 2004 ML320. The dials on the air conditioning system all worked fine when I bought it in March of last year. Two months ago while the heat was running there was a puff of smoke and niether the heat or air have worked since. I took it to my shop and my guy said that the compressor was working but that for some reason the flap wasn't opening to allow the air - heated or otherwise, to come out. The dials are all working fine from what we can tell. Any ideas?? I live in GA and not having heat is like certain death! |