Remove/Install Fuel Pump - AR47.20-P-5710GQ

MODEL 166 with ENGINE 651 

MODEL 166, 292 with ENGINE 157 

MODEL 166, 292 with ENGINE 276 

MODEL 166, 292 with ENGINE 278 

MODEL 166, 292 with ENGINE 642 

Illustration shows model 166.024 

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove fuel tank		AR47.10-P-4100GQ
2	Remove right locking ring	Model 166, 292 with engine 642 with code 228 (Auxiliary heater)	AR47.10-P-4100-02GQ
		After replacing the fuel pump (M3), cut off end of the fitting at the position shown. Ring nut to fuel tank	*BA47.10-P-1004-01J
		Prong wrench	Fig 1
3	Remove fuel pump (M3)	Do not deform the float linkage (1). The fuel level fill level will be indicated falsely otherwise. Allow escaping fuel to flow off into the fuel tank or catch it with absorbent rags.
4	Release and detach fuel line (2)	Do not kink, crush or twist fuel line (2) and do not lay in tight radii. Fuel line (2) must not exhibit any loops, indentations or damage. Damage and malfunctions can occur otherwise.
5	Detach fuel level indicator fill level sensor	If necessary	AR47.10-P-7000GQ
6	Install in the reverse order
7	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. Carry out engine test run and check fuel system for leaktightness	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A

Fig 1: Identifying Prong Wrench (164 589 01 07 00)

Courtesy of MERCEDES-BENZ USA