Remove/Install Stationary Heater Fuel Metering Pump - AR83.70-P-5654MFA

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Model 118, 177, 247

with code 228 (Auxiliary heater)

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 explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit	Do not operate stationary heater, auxiliary heater or engine with heater booster in closed rooms or when refueling. Allow heater unit to cool down after operation and wear protective gloves.	AS83.70-Z-0002-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
2	Release rear right underfloor paneling until the stationary heater fuel pump (Y23) is accessible.		AR61.30-P-1001MFA
3	Release and disconnect electrical connector (1) from stationary heater fuel pump (Y23).
4	Clamp off fuel hoses (2) with clamps.	Clamp	Fig 1
5	Detach fuel hoses (2) from stationary heater fuel pump (Y23).	Collect fuel which runs out in a suitable container. : Replace snap clamps. Make sure that fuel hoses (2) are securely seated and not leaking.
		Pliers for click clamps	Fig 2
6	Unscrew nut (3).
7	Remove stationary heater fuel pump (Y23) with bracket (4).	: Observe direction of installation of stationary heater fuel pump (Y23).
8	Remove stationary heater fuel pump (Y23) from bracket (4).	When replacing the stationary heater fuel pump (Y23).
9	Install in the reverse order.

Fig 1: Identifying Clamp (000 589 54 37 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Pliers For Click Clamps (171 589 00 37 00)

Courtesy of MERCEDES-BENZ USA