Radiator Cooling Fan runs constantly soon as engine started and goes to idle.
Checked the Temperature Sending Unit by unpluging the TSU and no change! Also, removed TSU and checked visually which told me nothing. If the TSU was open, would I be seeing the same problem??
Is your ac on? If so they should be running all the time at idle.
No AC is OFF!
Check your fan relay. Sounds like the contacts might be stuck.
Don't think it has a relay! Direct input to Cooling Fan is from a Control Module.
Looking for a Used SLK-Class in your area?
CarGurus has 1,355 nationwide SLK-Class listings starting at $1,492.
Search Mercedes-Benz SLK-Class Questions
Mercedes-Benz SLK-Class Experts