Refrigerant pressure sensor, function - GF83.40-P-2126-01T
WARNING: This page is about a different car, the 2009 Mercedes-Benz E550 and 2008 Mercedes-Benz E550. However, it is still accessible from the selected car via links, so may be relevant.
The resistance value of the refrigerant pressure sensor (B12) changes as a function of the refrigerant pressure.
This determined value is passed on by the driver-side SAM control unit with fuse and relay module (N10/1) via Controller Area Network bus class B (interior) (CAN-B) to the AAC [KLA] control and operating unit (N22) (without code (581) Comfort automatic air conditioning) or to the comfort AAC [KLA] control and operating unit (N22/7) (with code (581) Comfort automatic air conditioning).