I am in the process of tightening the screws that holds the wiper trim down on my 300M at the base of the windshield. Everytime the front end is taken apart they remove it and never get the screws in tight again. I am using nylon cable ties to shrink the holes that the trim screws go into and it is working well. I have one screw left. It is under the passenger side wiper. I need to either get the wipers to rest in the vertical position or remove the wiper arm entirely to get to that screw. It appears impossible to get the wipers to stop in any position other than the rest position at the bottom of the windshield. Is there any way to get them to stop in the up position? I've tried turning the car off mid-cycle, etc.