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

Engine 256.9 in model 213, 238, 257, 290 

Sample display with code 228 (stationary heater) 

Courtesy of MERCEDES-BENZ USA

Shown in the model 290 with M256.9 with code 915 (fuel tank with increased capacity) 

Courtesy of MERCEDES-BENZ USA

	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 contact with fuel.	No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Read out fuel level using vehicle diagnosis system.
		Engine 256.9 in model 213	AD00.00-P-2000-04B
		Engine 256.9 in model 238	AD00.00-P-2000-06LWO
		Engine 256.9 in model 257, 290 The fuel tank may be max. 1/4 full before the fuel pump (M3) is removed. The fuel will finds its way into the vehicle interior otherwise.	AD00.00-P-2000-06FR
2.1	Empty fuel tank using fuel pump (M3).	If the fuel tank is over 1/4 filled, with intact fuel pump (M3).	AR47.10-P-4001MSA
2.2	Drain fuel tank using a transfer delivery pump.	If the fuel tank is over 1/4 filled, with faulty fuel pump (M3).	AR47.10-P-4000MSA
3	Switch off the ignition and keep the transmitter key outside the transmitter range (at minimum 2m).
4	Open fuel filler flap and fuel filler cap.
5	Remove seat cushion in rear passenger compartment.	Engine 256.9 in model 213 with code 248 (Rear seat with integrated child seat)	AR91.12-P-1020LWA
		Engine 256.9 in model 213 except code 248 (Rear seat with integrated child seat) Engine 256.9 in model 238	AR91.12-P-1020LW
		Engine 256.9 in model 290 except code 568 (3-seater rear bench seat)	AR91.12-P-1021FRX
		Engine 256.9 in model 257 Engine 256.9 in model 290 with code 568 (3-seater rear bench seat) Only install seat cushion in rear after leak test.	AR91.12-P-1021FR
6	Suction off fuel vapors from vehicle interior.
			WS47.00-P-0039B
7	Remove service cover.	Engine 256.9 in model 290	AR47.10-P-4100-02MNI
		Engine 256.9 in model 213, 238	AR47.10-P-4100-02LW
		Engine 256.9 in model 257 Do not install the service cover until after the leak test.	AR47.10-P-4100-04OIB
8	Release and disconnect electrical connectors (1).
9	Remove fuel line (2) from fuel pump (M3) and seal openings with suitable stop plugs.	Engine 256.9 in model 213, 238, 257, 290 with code 228 (Additional warm water heating)
		Do not kink, crush, or twist the fuel line (2), and do not route it in tight radii. The fuel line (2) will otherwise be damaged.
		Record plug	Fig 2
10	Remove fuel line (3) from fuel pump (M3) and seal openings with suitable stop plugs.	Do not kink, crush, or twist the fuel line (3), and do not route in tight radii. Fuel line (3) will otherwise be damaged.
		Record plug	Fig 2
11	Remove locking ring (4).	Claw-type wrench	Fig 1
12	Lift fuel pump (M3) so far that electrical connector (7) and fuel lines (8, 9) can be accessed.
13	Release, disconnect electrical connector (7) and expose electric line.
14	Remove fuel line (8) from fuel pump (M3).
15	Remove fuel line (9) from fuel pump (M3).	Engine 256.9 in model 290 with code 915 (Fuel tank with increased capacity)
16	Remove fuel pump (M3) and collect escaping fuel using an absorbent rag.	Replace sealing ring.
17	Clean contact surfaces of sealing ring at fuel tank and at fuel pump (M3).
18	Install in the reverse order.
	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.	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
19	Perform engine test run and check fuel system for leaks.
20	Install the service cover.	Engine 256.9 in model 290	AR47.10-P-4100-02MNI
		Engine 256.9 in model 213, 238	AR47.10-P-4100-02LW
		Engine 256.9 in model 257	AR47.10-P-4100-04OIB
		Screw/bolt, maintenance cover to body	*BA47.10-P-1004-01P
21	Remove the system for extracting fuel vapors
			WS47.00-P-0039B
22	Install seat cushion in rear.	Engine 256.9 in model 213 with code 248 (Rear seat with integrated child seat)	AR91.12-P-1020LWA
		Engine 256.9 in model 213 except code 248 (Rear seat with integrated child seat) Engine 256.9 in model 238	AR91.12-P-1020LW
		Engine 256.9 in model 290 except code 568 (3-seater rear bench seat)	AR91.12-P-1021FRX
		Engine 256.9 in model 257 Engine 256.9 in model 290 with code 568 (3-seater rear bench seat)	AR91.12-P-1021FR

Fig 1: Identifying Claw-Type Wrench (001 589 00 07 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA