Engine 646 in model 909 with code MP5 (Engine version Euro 5) Fuel filter heater with condensation sensor (B76) and the fuel filter (3) can only be removed together and replaced.
2
Remove screw/bolts (1) and take out fuel filter heater with condensation sensor (B76)
Engine 646 in model 909 with code MS9 (Engine version Euro 4)
Installation: Clean the fuel filter (3) in the area of the fuel filter heater with condensation sensor (B76).
Installation: Replace O-rings (2) and moisten with fuel.