I would think at all speeds would point away from motor mounts. I'd suspect the 16 pin problem may be related, in any case it's a good place to start so that you can read the codes. Wiring diagram for the data link connector is here - http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1995/E320/SYSTEM%20WIRING%20DIAGRAMS/ One thing that sticks out is that pin 16 power comes from the OVP relay.