When the manual seat height adjustment is set to the maximum height on the drivers side, the seat will gradually ease down over time as you are driving. You will have to pump the lever up to get it back to the maximum height. The passenger side works fine and have had no issues with it. It doesn't matter if I am driving or my wife, we have the same problem with the seat. Had the vehicle back to the VW dealership and they can not duplicate the problem since you have to drive the vehicle for an hour or so. I bought the car new and have had this problem since day one.