FixVault

Remove/Install Fuel Level Sensor - AR47.50-P-0110MR

Model 172 with engine 152, 271.8, 274, 276, 651 

Fig 1: Fuel Level Sensor Components Location - Model 172 With Engine 276
G13846128Courtesy of MERCEDES-BENZ USA
CAUTION 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
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 
Note  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Empty the fuel tank. Engine 152, 271.8, 274, 276 in model 172
with code 494 (US version)
Engine 274 in model 172
with code 945 (China Stage 6 exhaust treatment)
AR47.10-P-4001WA 
Engine 152, 271.8, 274, 276 in model 172 except code 494 (US version) except code 945 (China Stage 6 exhaust treatment)
Engine 651 in model 172
AR47.10-P-4001W 
2 Remove fuel system control unit (N118) and place to one side with connected lines.   AR47.20-P-5717W 
3 Remove bracket from the fuel system control unit (N118). TORQUE SPECIFICATION Nut, fuel system control unit bracket to fuel tank *BA47.10-P-1012-01B 
4.1 Remove fuel filter. Engine 152, 271.8, 274, 276 in model 172  
REFER TO MAINTENANCE     AP47.20-P-0780RBS 
4.2 Unscrew nuts, remove locking ring, and remove cap. Engine 651 in model 172
INSTALLATION IMPORTANT Installation: Replace seal.
 
    TORQUE SPECIFICATION Nut, fuel filter to fuel tank *BA47.10-P-1007-01B 
5 Press catch springs (3) together and pull out fuel display fill level sensor (1) upward. NOTES
Do not bend linkage of the fuel display fill level sensor (1).
Malfunctions of the fuel system will occur otherwise.
INSTALLATION IMPORTANT Installation: Insert the fuel display fill level sensor (1) to the end stop so that the electrical contacts engage automatically.
 
6 Install in the reverse order.    
FUEL TANK

Number Designation Model 172
BA47.10-P-1007-01B Nut, fuel filter to fuel tank Nm 5
FUEL TANK

Number Designation Model 172
BA47.10-P-1012-01B Nut, fuel system control unit bracket to fuel tank Nm 2