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Hi - I have a 2013 C250 that I just replaced the compressor in and now the dash buttons will not turn the compressor on? Not sure what happened as everything was working in terms of turning on the AC, but it wasn't blowing cold air so I checked it out and needed to replace the compressor. The fuse's are good so I'm at a standstill with this issue. Any suggestions?
 

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If the battery was not disconnected during the repair then the system sensed the loss of pressure and went into protection mode.

It needs to be reset or have the protection mode turned off. You will need a scan tool that can handle MB specific code and resets.
 
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