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Mercedes ML 3.2 1998, Mercedes w124 250D 92'
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235 Posts
Discussion Starter #1
The air is blown only onto the windshield, and the other selections do not apear to work properly especialy the lower leg selection. What could be the cause? Are the flaps inside the air "mixer" selector in this car controled by electric motors or vaccum in the ML 320?
 

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02 ML320 06 ML500
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17,101 Posts
Every selection is controlled by cables (as shown in the illustration), except the Blend Door Motor, which is not your problem.

The Defroster Door might be stuck open or the cable to it is broken or disconnected. To check its operation, remove the underside panel on the passenger side. Then pull out the ETC (Transmission Control Module), then remove its bracket. Look up to the right and you will see the Defroster Cable.

Operate the selector knob for defrost and legroom to see if the defroster cable is attached and moves.
 

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thanks for this. My windshield vent is definitely stuck open or something also. I'll check this out and see if Im capable of doing this :)
 
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