ML 350 (163.157) V6-3.7L (112.970) (2004)
It receives the input information from the following devices:
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Refrigerant pressure sensor (B12)
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Coolant temperature sensor via CAN and sends signals to the following components:
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A/C compressor
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Auxiliary fan (M4) via relay (engine 111.977 and 112.942) or
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Engine and AC electric suction fan with integrated control (M4/7) with engine 113.942/981
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Relay (K21) for actuating the air conditioning (Tempmatic)
GF54.21-P-4110GH All Activity Module Position/Task/Function
GF54.21-P-4110GH All Activity Module Position/Task/Function
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with CODE (580) Air conditioner or Tempmatic for USA