Drivers side window will not go completely airtight when up.drops and goes up when door opens and shuts, but not high enough to seal correctly
My 02 had this same problem, the glass has shifted position in the mechanism. You will need to take the inner door card off to get at the mechanism, lower the glass about half way then reach through the large opening in the door panel to feel for the large 'cog' shaped retaining bolts that hold the glass to the mechanism (one either side, both facing the outer door skin). A 5mm torx or allen key bit is required to loosen both 'cogs'. You can then adjust the glass position. This is possibly best done with two people...once the glass is loose, make sure you move the glass first to break the seal (it may have stuck to the rubber seal over time, so will not move much), then gently tighten into place, raise the window to the full up position, shut the door fully, then with the help of an assistant, one inside the car one outside, move the glass into the desired place and tighten the cogs. Open the door, fully lower and fully raise the glass, then keep the switch in the up position for 5 seconds, this teaches the ECU the new position. Check that the window closes when you open and close the door, if not, try adjusting the glass angle with the adjustment screws located at the very bottom of the door. When in the right position, you should just be able to pull a sheet of paper past the glass and the seal. Boom, done!
2004 Mini Cooper
on Feb 21, 2017