1. Fuel supply unit: with fuel pre-supply pump -G6-; fuel pump electrical check in Guided Fault Finding; after installation, fill the vehicle with at least 5 liters of fuel; after installing the fuel delivery module, it is necessary to cut off the plug on the fuel delivery module fitting in order to connect the auxiliary heater fuel line
2. O-ring: replace; install dry
3. Ring nut, 110 Nm: loosen and tighten with wrench -T30101 (3087) -
Note: Make sure that the connector bracket on the fuel delivery unit flange is not damaged when loosening and tightening the ring nut.
4. Fuel supply line: to the fuel filter; fastened to the fuel tank with clamps; do not bend; to disconnect, press the fitting lock; unlock and disconnect the quick coupling; when installing the pressure and return lines, follow the arrows on the connecting flange; insert so that it clicks with a distinct sound; once again press the hose on the fitting and then pull the hose back to check that the quick coupling is correctly fixed
5. Fuel pump control unit -J538-: Check in Guided Fault Finding
6. Electrical connector: fuel pump control unit -J538-; make sure that the fixation is secure and check that the connector is correctly fastened by pulling on it
7. Electrical connector; fuel pre-supply pump -G6-; make sure that the fixation is secure and check that the connector is correctly fastened by pulling on it
8. Electrical connector: fuel level sender -G-; make sure that the fixation is secure and check that the connector is correctly fastened by pulling on it
9. Return fuel line: from the engine; fastened to the fuel tank with clamps; do not bend; to disconnect from the flange, press the coupling lock; when installing the pressure and return lines, follow the arrows on the connecting flange; insert so that it clicks with a distinct sound; once again press the hose on the fitting and then pull the hose back to check that the quick coupling is correctly fixed
10. Fuel gauge sender -G-