Seems like this is not a rare problem on the X5. I really don't care HOW they fix it so long as they fix it ONCE and do it right.

I had the same problem with a 1996 Ford Explorer. It needed 2 trips to the dealer to fix. The FIRST time in the tech checked it out and lubricated the tracks - he found NO LEAKS. Two days later in a spring shower it was still leaking. Turns out - I could not believe this - the first tech found no leaks since it wasn't raining and he did not test the truck with water from a hose. Either he was an idiot, a lazy bum or both. They cleared the drain holes/tubes on the second visit.

I could understand how a $40K Explorer might leak, did not expect it to happen on an X5 that costs 2x as much. I hope the BMW techs are 2x smarter.