Make: Mercedes-Benz
Years: 1975-1979
Model: 450SEL 6.9
Engine: 100.985
Chassis: 116.036
Transmission: 722.003
Notes: Compares total resistance of the sensor circuit: 1. In car temperature 2. Ambient temperature sensor. 3. Potentiometer setting at selector switch. If values between these units are unequal, differences will be amplified and will drive servo to correct position until resistance values are equal. (Resistance value min. 20 / max. 70)