Jump the low/hi pressure switch on the drier to see if lack of refrigerant is the problem. If the compressor gets power with the switch jumped you are out of gas.

If there is no power to the drier switch check your fuses and then look at the ETR switch behind the glovebox, easy access from beneath.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician