How to tell if a Mercedes Sprinter has a fault?
How to tell if a Mercedes Sprinter has a fault? If no control voltage is present look for a break in the wiring from the valve to the ECU. Trace back the wires to the ECU connector and prove continuity exists from the ECU connector to the valve. Pin outs and wire colours are given in the included diagrams. What to do if your Mercedes Sprinter has a split pipe? Check vac supply to this device observing and rectifying any split or leaking pipework. Once good vacuum supply has been determined, with the ignition off (no power to the valve...