the vent in my ml350 2010 turns on 30 minutes after the vehicle is turned off and stays on until drivers door is opened....
2010 ml350: the Ac vent will start up after about 30 minutes after the vehicle is turned off. I check on it an hour later and the vent is still on. It only turns off after I open the door. I've taken to the MB service dept. and they tell me it's normal.
It's drying your evaporator to prevent mould.
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