I'm new to X5, but just had an issue where the front ducks wouldn't blow warm air unless it's set to 84F. I then realized that I've seen a hot/cold vent adjustment in one of the iDrive menus. Set it to hot and sure enough it started blowing warm air without setting it to max. In my e90 there was a hot/cold thumbwheel, but I guess in x5 it was replaced with iDrive menu.


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