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Home >> Mercedes Benz >> 2020 >> S450 Base >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Mixture Formation - 222 Chassis (2 Of 3) >> Testing & Repair >> Remove/Install Low Pressure Fuel Lines >> Remove/Install Low Pressure Fuel Lines - AR07.03-P-1121MNL

Remove/Install Low Pressure Fuel Lines - AR07.03-P-1121MNL

Engine 176 in model 217, 222 

G15366132Courtesy of MERCEDES-BENZ USA
DANGER Risk of explosion  caused by fuel igniting. Risk of injury  to skin and eyes caused by fuel spraying out at high pressure Keep all ignition sources out of hazard area. Do not carry out any work on system when it is pressurized. AS07.16-Z-0001-01A
DANGER 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
CAUTION Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning 
caused by swallowing engine oil
Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.
AS18.00-Z-0001-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
  Note on calculation of tightening torque when using insertion or socket tools with various effective lengths   AH00.00-P-0015-01CW
  General information on work on gasoline direct injection system   AH07.00-P-2000-01A
REMOVINGINSTALLING Remove/install     
1 Disconnect battery ground line   AR54.10-P-0003LF
2 Remove left-hand air filter housing   AR09.10-P-1151MNL
    INSTALLATION IMPORTANT : Do not install upper engine cover until after the leak test.  
3 Remove soundproofing (3)    
4 Remove filler neck   AR01.40-P-0004MNL
5 Remove covers (5) TORQUE SPECIFICATION M6 *BA00.10-P-1002-01A 
6 Remove bleed line (6) from cylinder head cover TORQUE SPECIFICATION Bolt, vent line to cylinder head cover/turbocharger *BA01.20-P-1001-01J 
7 Relieve fuel pressure over diagnostic socket   AR07.03-P-1460-01MNL 
    TORQUE SPECIFICATION Dust protection cap to service connection *BA07.03-P-1005-01H 
    SPECIAL TOOL Pressure hose Fig 3
8 Clean area around left low-pressure line with service connection (7) Assembly cleaner *BR00.45-Z-1028-04A 
9 Remove left low-pressure line with service connection (7) from fuel high-pressure pump (4) TORQUE SPECIFICATION Union nut, fuel line to fuel distributor/fuel system high-pressure pump *BA07.03-P-1001-01H 
    SPECIAL TOOL Box wrench bit Fig 2
10 Remove fuel supply line from service connection, and seal openings with suitable stop plugs TORQUE SPECIFICATION Union nut, fuel hose to diagnostic socket/fuel line *BA07.03-P-1006-01H 
    SPECIAL TOOL Record plug Fig 1
    SPECIAL TOOL Box wrench bit Fig 2
11 Remove left low-pressure line with service connection (7) from cylinder head cover and bracket of coolant return line of exhaust gas turbochargers TORQUE SPECIFICATION Bolt, fuel line clamp to engine/bracket *BA07.03-P-1004-01H 
12 Seal opening at fuel system high-press pump (4) with suitable stop plug SPECIAL TOOL Record plug Fig 1
13 Check left low-pressure line with service connection (7) for damage   AR07.03-P-1120-01MNE 
    Assembly cleaner *BR00.45-Z-1028-04A 
    If a problem arises
↓
Replace left low-pressure line with service connection (7).
 
14 Remove left low-pressure line with service connection (7) and seal with suitable stop plugs INSTALLATION NOTES : Always replace hose after opening clamp.
Leaks can occur otherwise.
 
    IMPORTANTCommercially available devices/tools 
Clamping pliers
 
    SPECIAL TOOL Record plug Fig 1
15 Remove right air filter housing   AR09.10-P-1152MNL
16 Remove soundproofing (2)    
17 Remove covers (13) TORQUE SPECIFICATION M6X1 *BA00.10-P-1002-04A 
18 Remove bleed line (12) from cylinder head cover TORQUE SPECIFICATION Bolt, vent line to cylinder head cover/turbocharger *BA01.20-P-1001-01J 
19 Clean area around right low-pressure line (11) Assembly cleaner *BR00.45-Z-1028-04A 
20 Remove right low-pressure line (11) from fuel high-pressure pump (1) TORQUE SPECIFICATION Union nut, fuel line to fuel distributor/fuel system high-pressure pump *BA07.03-P-1001-01H 
    SPECIAL TOOL Box wrench bit Fig 2
21 Remove right low-pressure line (11) from cylinder head cover TORQUE SPECIFICATION Bolt, fuel line clamp to engine/bracket *BA07.03-P-1004-01H 
22 Seal openings on fuel high-pressure pure with suitable stop plugs SPECIAL TOOL Record plug Fig 1
23 Check right low-pressure line (11) for damage   AR07.03-P-1120-01MNE 
    Assembly cleaner *BR00.45-Z-1028-04A 
    If a problem arises
↓
Replace right low-pressure line (11).
 
24 Remove right low-pressure line (11) and seal with suitable stop plugs INSTALLATION NOTES : Always replace hose after opening clamp. Leaks can occur otherwise.  
    IMPORTANTCommercially available devices/tools 
Clamping pliers
 
    SPECIAL TOOL Record plug Fig 1
25 Remove charge air cooler Right charge air cooler
Engine 176 in model 217, 222 with small lower coolant expansion reservoir for low-temperature circuit
AR09.41-P-6828MNL
    Left charge air cooler Engine 176 in model 217, 222 with small lower coolant expansion reservoir for low-temperature circuit AR09.41-P-6827MNL
    Right charge air cooler Engine 176 in model 217, 222 with large lower coolant expansion reservoir for low-temperature circuit AR09.41-P-6828MNP
    Left charge air cooler Engine 176 in model 217, 222 with large lower coolant expansion reservoir for low-temperature circuit AR09.41-P-6827MNP
    INSTALLATION IMPORTANT : Only install lower engine compartment lining after leak test.  
26 Remove boots (8) from exhaust gas turbochargers TORQUE SPECIFICATION Clamp, boot to exhaust gas turbocharger/air filter *BA01.20-P-1003-01J 
27 Remove boots (9) TORQUE SPECIFICATION Bolt, clamp for charge air hose to charge-air distributor *BA09.41-P-1002-01X 
28 Remove center low-pressure line (10) TORQUE SPECIFICATION Bolt, fuel line clamp to engine/bracket *BA07.03-P-1004-01H 
29 Remove hoses from center low-pressure line (10) and seal openings of low-pressure line (10) with suitable stop plugs INSTALLATION NOTES : Always replace hoses after opening clamp.
Leaks can occur otherwise.
 
    IMPORTANTCommercially available devices/tools 
Clamping pliers
 
    SPECIAL TOOL Record plug Fig 1
30 Install in the reverse order    
WARNING 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
31 Perform an engine test run and check engine for proper operation and leak tightness    
32 Install lower engine compartment paneling   AR61.20-P-1105LF
33 Install upper engine cover    
HEADLESS SCREWS: BOLTS AND NUTS, COARSE-PITCH THREAD

Number Designation Model all (4xWD, CAR, smart)
BA00.10-P-1002-01A M6 8.8 Galvanized Nm 9
Phosphated Nm 9
10.9 Galvanized Nm 13
Phosphated Nm 12
12.9 Galvanized Nm 16
Phosphated Nm 14
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number Designation 8.8 10.9
BA00.10-P-1002-04A M6X1 Nm 9 13
CRANKCASE VENTILATION SYSTEM, CYLINDER HEAD COVER

Number Designation Engine 176
BA01.20-P-1001-01J Bolt, vent line to cylinder head cover/turbocharger Nm 9
CRANKCASE VENTILATION SYSTEM, CYLINDER HEAD COVER

Number Designation Engine 176
BA01.20-P-1003-01J Clamp, boot to exhaust gas turbocharger/air filter Nm 1, 5
INJECTION NOZZLES, INJECTION VALVES, LINES

Number Designation Engine 176
BA07.03-P-1001-01H Union nut, fuel line to fuel distributor/fuel system high-pressure pump In case of reusability   Nm 22
For new lines Stage 1 Nm 15
Stage 2 ∠° 90
INJECTION NOZZLES, INJECTION VALVES, LINES

Number Designation Engine 176
BA07.03-P-1004-01H Bolt, fuel line clamp to engine/bracket Nm 9
INJECTION NOZZLES, INJECTION VALVES, LINES

Number Designation Engine 176
BA07.03-P-1005-01H Dust protection cap to service connection Nm 1
INJECTION NOZZLES, INJECTION VALVES, LINES

Number Designation Engine 176
BA07.03-P-1006-01H Union nut, fuel hose to diagnostic socket/fuel line Nm 24
CHARGE AIR LINE/CHARGE AIR COOLING

Number Designation Engine 176
BA09.41-P-1002-01X Bolt, clamp for charge air hose to charge-air distributor Nm 6
Fig 1: Identifying Record Plug (129 589 00 91 00)
G12078802Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Box Wrench Bit (000 589 80 03 00)
G11138963Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Pressure Hose (119 589 04 63 00)
G12078803Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1028-04A Assembly cleaner A 000 986 56 01