Thermostatic Switch

To remove
For cars within the following VIN interval:
T2037750 - W201995O (3D/5D) and
T7010027 - W7008292 (CV).

For cars with 6-cyl. engine go to step 3.

Note:
It is not necessary to evacuate or discharge any refrigerant to perform this repair.





1. Drain the coolant and remove the lower radiator hose leading to the water pump (4-cyl.).





2. Undo the control valve if necessary (turbo).

3. Remove the cable tie and disconnect the thermostatic switch.





4. Cut off a 19 mm ring spanner to a length of approx. 120 mm.

5. Remove the thermostatic switch using the ring spanner.

To fit

1. Transfer the plastic sleeve for the electrical connection to the new thermostatic switch.





2. Fit the new thermostatic switch.

Note:
Take care not to damage the threads when tightening.

3. Connect the leads and secure them with a cable tie.

4. Fit the control valve (turbo).





5. Fit the lower radiator hose leading to the water pump (4-cyl.).

6. Fill with coolant (4-cyl.) and bleed the system.

7. Perform a pressure test on the cooling system.