Operation CHARM
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745Li (E66) V8-4.4L (N62)
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Rear Window Heater
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Rear Window Heater
Rear Window Heater (HHS)
The electronic rear window heater output stage of the PM is activated by a "HHS On"(K-CAN-S via CAS via K-CAN-P) message from the IHKA control unit. Control is directly by the final stage.