Replace fuel filter · ap4720a0780a · Mercedes-Benz WIS

AP47.20-A-0780A

Replace fuel filter

18.7.06

ENGINE 457.939 /945 /946 /949 in MODEL NAB372.124

ENGINE 457.939 /945 in MODEL NAB372.317

A47.20-0009-06

Shown on model 372.317 with
engine 457.939

1 Fuel filter cap

10 Fuel filter housing

 Danger!	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
1	Open engine compartment flap
	Removing
2	Unscrew fuel filter cap (1) from fuel filter housing (10)
3	Remove fuel filter cap (1) with fuel filter insert	 When the fuel has drained completely out of the fuel filter housing (10): Detach fuel filter cap (1) with fuel filter insert from fuel filter housing (10). Open the tank cap if necessary Ensure that no foreign bodies reach the fuel filter housing (10).
4	Detach fuel filter insert from fuel filter cap (1)	 Unclip the fuel filter insert from the fuel filter cap (1) by pressing sideways.
	Install
5	Install fuel filter insert on fuel filter cap (1)
6	Screw fuel filter cap (1) onto fuel filter housing (10)		*BA47.25-N-1002-01H
			*WH58.30-Z-1052-12A
			*WH58.30-Z-1037-12A
 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
7	Bleed fuel system		AP47.00-A-1720-01A
8	Start engine	 If the engine does not start after approx. 30 seconds: Wait for one minute and repeat the starting procedure.
	Checking
9	Check leaktightness of fuel filter housing (10)
10	Turn off engine
11	Close engine compartment flap

 Fuel pipes/hoses

Number	Designation		Engine 457.9


BA47.25-N-1002-01H	Fuel filter cover on fuel filter housing	Nm	25

Commercially available tools

Number	Designation
WH58.30-Z-1037-12A	Torque wrench
WH58.30-Z-1052-12A	Torque tool kit

Referenced documents

ap4700a172001a Bleed fuel system
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.
as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.