This instruction will show you guide on how to change the engine fuel filter on Mercedes-Benz E-Class W212 Diesel engine(OM651), but the procedure is mostly the same for other models.
Open and close the fuel cap to lower the pressure in the tank
Remove engine cover
Use plier for click clamps part-nr 171 589 0037 00, these tools are not recommended by MB.
Remove hoses by hands or plastic tools
Hose clamps part-nr
13-14.5 mm A006 997 18 90
14.5-15.5 mm A004 997 20 90
Important: hose clamps should not be reused
Take out old filter then replace a new filter from BOSCH
Inspect the hoses for cracks, if you find damage the the hose, it should be replaced
According to the MB documents, key should be in position(2) under 5 seconds to fill the new filter before start.
Turn the ignition on, check for leaks
No leaks put the engine cover back
More Mercedes-Benz cases, please refer to Benz Trouble Repair.