Originally Posted by H8Rain

It has nothing to do with actually washing the car, it's the fact that you start the car, move it a couple of feet and then turn it off. That 10-20 seconds of run time makes the start up the next day rough. I'm not saying it happens to all cars, but it happens to all of mine everytime I do this and it happens to alot of other people over on the E39 board that I also visit. I had a 4-Runner before the X5 and didn't have a problem with that.