One problem related to windshield wiper/washer has been reported for the 2007 Mercedes Benz S550. The most recently reported issues are listed below.
2007 mercedes-benz S550v seat belts keep locking and can not be used. Consumer states that the vehicle also have problems with the transmission, windshield wipers, and radio. The passenger seatbelt would lock and could not be used. The transmission was stuck in park, the windshield wipers would move all the time no matter if it was sunny or raining. The doors would not close properly. After the radio was turned off, static noise was heard. The steering control module was replaced.