Well, the quickest way to check it out is to engage the a/c system, check under the hood to see if the compressor is actually spinning with its belt still attached. If the belt is thrown, then the compressor is seized. If everything is in fact turning, but just not getting cool, then you have to have the system checked for leaks, repaired, and then re-charged.

If the compressor needs to be changed (along with the receiver/dryer- necessary to get warranty coverage on new compressor), make sure the whole system is flushed completely before re-charging. Otherwise, metal particles from your previous compressor will hasten the demise of the new one...

Hope this helps-

JAS

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94 E320
71 350SL