Engine - Coolant Temperature Sensor/Switch: Service and Repair

Replacing Coolant Temperature Sensor (DME)


NOTE: Read out fault memory of EMS2000 control module, check stored fault memory, rectify faults, clear fault memory.


WARNING!
Danger of scalding.


Work on the cooling system should only be carried out when the engine has cooled down.

Turn off ignition.

R50 only:
Remove coolant pressure cap from fill tower.
Remove air intake filter housing.
Remove battery box.
Drain coolant below the level of the coolant sensor.

R53 only:
Remove coolant pressure cap from expansion tank.
Remove air intake filter housing.
Drain coolant below the level of the coolant sensor.







Disconnect coolant sensor connector (1).
Remove coolant sensor (2), using a deep 19 mm socket.
Tightening torque: 17 Nm
Refill and bleed coolant system.


NOTE: Read out fault memory of EMS2000 control module, check stored fault memory, rectify faults, clear fault memory.