Reduce fuel pressure through service valve - AR07.03-P-1460-01VA

Risk of explosion  caused by fuel igniting, risk of poisoning  caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel

No fire, sparks, open flames or smoking. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing when handling fuel.

AS47.00-Z-0001-01A

Fig 1: Identifying Pressure Hose (119 589 04 63 00)

Courtesy of MERCEDES-BENZ USA

Shown on engine 272 in model 171 without fuel tank with exterior filter, code 917 

Fig 2: Identifying Protective Cap Of Service Valve With Angled Piece

Courtesy of MERCEDES-BENZ USA

1. Unscrew protective cap (1) of the service valve (2) of the fuel distributor.
2. Insert end of the pressure hose (01) into the container (3).
3. Screw on union nut of the angled piece (01a) to the service valve (2).

   At this point, the service valve (2) is opened and the fuel pressure in the fuel distributor is reduced. Fuel escapes from the end of the hose.

4. Unscrew the union nut of the angled piece (01a) from the service valve (2).
5. Screw protective cap (1) onto the service valve (2) of the fuel distributor.

   For vehicles with fuel tank with exterior filter, code 917 the protective cap (1) must be tighten with torque.

   Ensure that the sealing ring of the protective cap (1) is replaced.