K1 and K2 line, location/purpose - GF54.30-P-2015A
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
MODEL 129, 140 as of 1.6.96, 170, 202 as of 1.8.96, 208 up to 31.7.99, 210 as of 1.6.96 up to 30.6.99
The K1 and K2 line connects the instrument cluster to the automatic air conditioning pushbutton control module.
The serial data line K1 supplies the air conditioning control module with the following information from the instrument cluster:
- Outside temperature
- Engine coolant temperature
- Driving speed of vehicle
- Terminal 58d (illumination)
- Engine speed
- °F/°C conversion
- Full load fuel shutoff (diesel-engined models)
- Acceleration recognition (gasoline-engined model)
As of 02.97 also:
- Compressor emergency stop
- Compressor shutoff when accelerating
The serial data line K2 supplies the air conditioning control module with the following information from the instrument cluster:
- Refrigerant pressure
- Idle speed increase