Mercedes Benz CLK heater

Car: Mercedes Benz CLK
Variant: 230 aventgaurd
Model Year: 2001
Categories: Leaks & Noises
The heater has turned its self on to high speed and now I can not turn it down or off, even when the key is removed. I have to take the fuse out so it dosent flatten the battery.
Any ideas.
Posted: Feb 8, 2011 (13 years ago)
check the wiring going to heater switch pack,make sure nothing is damaged,could be a fault with control module,get a diagnostic done if available on that model and see what faults show
Posted Feb 8, 2011 (13 years ago)
Sounds like your heater resistor pack is faulty and requires replacing (resistor pack controls blower motor output) I think it's pretty easy to replace on that car .
Posted Feb 9, 2011 (13 years ago)
Thanks for the 2 answers to my heater problems. Can you tell where to find the heater resisitance pack on my clk.
Posted Feb 10, 2011 (13 years ago)
This from Merc forum might help you ,

You remove the cover under the dash passenger side, remove the regulator the remove the 4 screws holding in the motor, you can then test it on the bench with a 12 volt supply
Posted Feb 11, 2011 (13 years ago)

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