Mercedes® Female Connection Freon Pressure Switch, 1977-1985 (123)

This is the Air Conditioning High Pressure Sensor that functions off the "high pressure" side of the Air Conditioning system located next to the A/C Accumulator. Its function is to monitor the auxiliary cooling fan on and off or if the pressure in the system goes too high it shuts it down. A faulty switch will result in poor cooling of the Air Conditioning system.