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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53904
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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Clk: Radiator fans knocking on 1999 Mercedes clk 430 only 35000

Customer Question

Radiator fans knocking on 1999 Mercedes clk 430 only 35000 miles on car. Every couple minutes you hear them knocking
Submitted: 2 years ago.
Category: Mercedes
Expert:  Marty replied 2 years ago.
Hi, that's an unusual symptom for the fans. Can you give me more of an explanation? Are the fans running as they should and occasionally make a knocking sound?
Customer: replied 2 years ago.
No they are stuck
Customer: replied 2 years ago.
Start to move then clunk
Expert:  Marty replied 2 years ago.
Ok, I would check to see if the blades are hitting something. If there is nothing impeding the movement of the fan blades I'd have to say that one of the fans has gone bad. If both fans act the same way I'd check closely to see if they are hitting something. You should be able to turn the car off and rotate each fan freely by hand.
Customer: replied 2 years ago.
Can't move them. Could someone have hit my front bumper in parking lot but there are no marks I see no damage
Expert:  Marty replied 2 years ago.
That's what I was thinking. I'm wondering if they were pushed into the a/c condenser. Maybe you could try pulling the fans and bracket away from the condenser and see if they will turn.
Expert:  Marty replied 2 years ago.
Hi, I'm just following up with you on the Mercedes. Was my answer helpful?