Your problems section for this vehicle states... The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not cycle on, the AC system will not blow cold air. If the AC compressor is stuck on, the air will be very cold at first, before warming up. How can you test whether this is the problem? No cold air coming out. Thank You
a/c Trouble on 2004 Mercedes-Benz SLK320
by DFLMercedes in Huntersville, NC on May 18, 2010
ANSWER by JParsons , May 18, 2010
The best way to find out if that is indeed the problem with your a/c system would be to run a diagnostic scan of the vehicle systems. If the evaporator temperature sensor is faulty there will be a code for it. I recommend having this done by a professional, with the proper equipment. Here is a link that can assist you in locating a proper repair facility: http://repairpal.com/directory.