Remove/install fuel pump - AR47.20-P-5710SX

ENGINES 156, 157, 273, 275, 278 in MODEL 216 

ENGINES 156, 157, 272, 273, 275, 276, 278 in MODEL 221 

Fig 1: Identifying Fuel Pump Components

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Seat Adjustment Mechanism, Floor Covering And Special Protection Mat

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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. Only pour fuels into suitable and appropriately marked containers. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
1	Check fuel level	The fuel tank must only be filled to a maximum of a half otherwise the fuel will finds its way into vehicle interior. Pump off fuel as required: ↓ Empty fuel tank if fuel pump is intact.	AR47.10-P-4001SX
		Empty fuel tank if fuel pump is faulty.	AR47.10-P-4000SX
2	Open fuel filler flap and filler cap
3	Move front passenger seat to front-most position
4	Switch off ignition
5.1	Remove right or continuous rear seat cushion	Vehicles without top protection Model 221.0 with code 223, rear bench seat with electrically adjustable outer seats, lumbar support and pneumatically raisable head restraints. Model 221.1 with code 223, rear bench seat with electrically adjustable outer seats, lumbar support and pneumatically raisable head restraints or with code 224, Design rear bucket seat system.	AR91.12-P-1020SZ
		Model 221.0 except code 223, rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints. Model 221.1 except code 224, rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints, code 223 and except Design rear bucket seat system.	AR91.12-P-1020SY
		Model 221.0 with code 223, rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints. Model 221.1 with code 223, rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints, or with code 224, Design rear bucket seat system.	AR91.12-P-1020SX
		Model 216	AR91.12-P-1020SC
5.2	Remove seat adjustment mechanism (8) on right rear seat	Model 221 with maximum protection, code Z07	AR91.12-P-1520SXS
6.1	Fold back the insulation mat (1)	Vehicles without top protection
6.2	Unclip floor covering (9) in the area of special protection mat (10) and lift	Model 221 with maximum protection, code Z07
7	Lift special protection mat (10) and set aside	Model 221 with maximum protection, code Z07 Installation:  Ensure correct installation: the special protection mat (10) must lay evenly! Align cutouts in the special protection mat (10) to the bores in the floor plate.
8	Turn cover (2) counterclockwise and remove	The markings (2a, 2c) must point towards each other for the purposes of disassembly and assembly. In a locked condition the markings (2a, 2b) must point towards each other. Installation:  Check for leaks before attaching the cover (2).
9	Unscrew nuts (3a)		*BA47.10-P-1001-01L
10	Remove ring (3) and cover (4)	Installation:  Replace gasket (4a).
11	Release and disconnect fuel pump connector (M3x1)
12	Release and detach fuel line (5)	Press notch (01) in the direction of the arrow using a screwdriver.
13	Open catches (6) in direction of the arrow
14	Remove fuel pump (M3) from swirl pot (7)	Catch escaping fuel using absorbent rags in order to avoid fouling the vehicle interior. Allow escaping fuel to flow off into right half of fuel tank.
15	Install in the reverse order
	Checking
	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
16	Start engine and check fuel system for leaks