Been searching the forums but can't seem to solve my problem. I have a 2002 C320 Wagon and the wipers won't turn off. Intermediate, normal and fast settings work normally, but back in the off position the wipers continue to operate as if in normal continuous mode. Wiper fuse is ok. Swapped the relays around and problem persists. Took the relay apart and cleaned it as some forums suggest. Then bought a new wiper switch and installed and no change. I thought about the rain sensor although I don't think that should cause this. Fuse fine. Problem the same whether the sensor connector is disconnected or connected. It was suggested that the park position sensor in the wiper motor was bad but I swapped the wiper motor and the problem remains. In the intermittent setting the wipers stop in the proper position between swipes. The wipers were off initially after I changed the motor but once I pressed the switch to spray the windshield with washer fluid the wipers came on and won't turn off even in off position. I would appreciate anyone's expertise. Thanks.