M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Confusing climate control problem.

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Old Jun 3, 2018 | 08:26 AM
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Danny mills's Avatar
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From: Galicia, Spain
ML 270 CDI
Confusing climate control problem.

Hello all,
I have a ML 270 CD1 2003.
the climate control was not working when I got the car.
it only blew hot air and non of the controls other than fan speed seemed to do anything.
I changed the 3 dial control unit for one I got from eBay.
now I can set all the climate function perfectly, accept when I'm driving? If I need to turn the temp from hot to cold or cold to hot, I have to turn the engine of and restart the car before it will do anything?
the same applies to temp change with the cold or hot fields. IE turning from 22 to 26 degrees centigrade does nothing until I stop the car, turn off and restart.
any help or advice would be much appreciated.
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Old Jun 3, 2018 | 06:26 PM
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texterted's Avatar
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ML420 W164 (2009)
You probably need this forum.... W163 forum.
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Old Jun 3, 2018 | 07:10 PM
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ML 270 CDI
Originally Posted by texterted
You probably need this forum.... W163 forum.
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