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

Engine 176 in model 463

as of model year 2019

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	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
	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Remove/install
1	Disconnect ground line of on-board electrical system battery (G1)		AR54.10-P-0003XG
2	Remove left-hand air filter housing		AR09.10-P-1151XGA
		: Only install upper engine cover after the leak test.
3	Remove noise insulation (7)
4	Relieve fuel pressure over diagnostic socket		AR07.03-P-1460-01XGA
		Dust protection cap to service connection	*BA07.03-P-1005-01H
		Pressure hose	Fig 3
	Left low-pressure line
5	Remove noise insulation (3)
6	Release and disconnect electrical connector on left fuel pressure and temperature sensor (B42/2) and place to one side
7	Release and disconnect electrical connector on cylinder 5 intake CAMTRONIC actuator (Y49/15) and place to one side
8	Release and disconnect electrical connector on cylinder 7 fuel injector (Y76/7) and place to one side
9	Remove cable duct (6) from left cylinder head cover		AR15.18-P-1000-07XGA
		Bolt, engine wiring harness to cylinder head cover	*BA15.18-P-1001-01G
10	Remove bleed line (8) from left cylinder head cover	: Replace seals of bleed line (8).
		Bolt, vent line to cylinder head cover/turbocharger	*BA01.20-P-1001-01J
11	Remove filler neck for engine oil		AR01.40-P-0004XGA
12	Remove screws on service connection	Bolt, fuel line service connection to left cylinder head cover	*BA07.03-P-1002-01H
13	Remove brackets of left low-pressure line with service connection (9) from left cylinder head cover and bracket of coolant return line of exhaust gas turbochargers	Bolt, fuel line service connection to left cylinder head cover	*BA07.03-P-1002-01H
		Bolt, fuel line clamp to engine/bracket	*BA07.03-P-1004-01H
14	Clean area around left low-pressure line with service connection (9)	Assembly cleaner	*BR00.45-Z-1028-04A
15	Remove fuel supply line (5) from service connection and seal openings with suitable stop plugs	Union nut, fuel hose to diagnostic socket/fuel line	*BA07.03-P-1006-01H
		Box wrench bit	Fig 2
		Record plug	Fig 1
16	Remove left low-pressure line with service connection (9) from fuel high-pressure pump (4) and seal openings with suitable stop plug	Union nut, fuel line to fuel distributor/fuel system high-pressure pump	*BA07.03-P-1001-01H
		Record plug	Fig 1
		Box wrench bit	Fig 2
17	Remove left low-pressure line with service connection (9)	: After opening the clamp, replace hose with clamps. Leaks can occur otherwise. Commercially available devices/tools Clamping pliers
		Record plug	Fig 1
18	Check left low-pressure line with service connection (9) for damage	Assembly cleaner If a problem arises ↓ Replace left low-pressure line with service connection (9).	*BR00.45-Z-1028-04A
19	Remove brackets from left low-pressure line with service connection (9)	When replacing left low-pressure line with service connection (9).
	Right low-pressure line
20	Remove right air filter housing		AR09.10-P-1152XGA
21	Remove noise insulation (1)
22	Remove noise insulation (15)
23	Remove bleed line (13) from right cylinder head cover	: Replace seals of bleed line (13).
		Bolt, vent line to cylinder head cover/turbocharger	*BA01.20-P-1001-01J
24	Release and disconnect electrical connector on right fuel pressure and temperature sensor (B42/1) and place to one side
25	Release and disconnect electrical connector on cylinder 3 intake CAMTRONIC actuator (Y49/13) and place to one side
26	Release and disconnect electrical connector on cylinder 2 fuel injector (Y76/2) and place to one side
27	Release and disconnect electrical connector on cylinder 3 fuel injector (Y76/3) and place to one side
28	Remove brackets of right low-pressure line (14) from right cylinder head cover	Bolt, fuel line clamp to engine/bracket	*BA07.03-P-1004-01H
29	Clean area around right low-pressure line (14)	Assembly cleaner	*BR00.45-Z-1028-04A
30	Remove right low-pressure line (14) from fuel high-pressure pump (2) and seal openings with suitable stop plugs	Union nut, fuel line to fuel distributor/fuel system high-pressure pump	*BA07.03-P-1001-01H
		Record plug	Fig 1
		Box wrench bit	Fig 2
31	Remove right low-pressure line (14) and seal openings with suitable stop plugs	: After opening the clamp, replace hose with clamps. Leaks can occur otherwise. Commercially available devices/tools Clamping pliers
		Bolt, fuel line clamp to engine/bracket	*BA07.03-P-1004-01H
		Record plug	Fig 1
32	Check right low-pressure line (14) for damage	Assembly cleaner If a problem arises ↓ Replace right low-pressure line (14).	*BR00.45-Z-1028-04A
33	Remove brackets from right low-pressure line (14)	When replacing right low-pressure line (14).
	Center low-pressure line
34	Remove charge air cooler	Right charge air cooler	AR09.41-P-6828XGA
		Left charge air cooler	AR09.41-P-6827XGA
35	Remove boots (10) with bleed lines from exhaust gas turbochargers	Bolt, clamp for charge air hose to charge- air distributor	*BA09.41-P-1002-01X
36	Remove charge air hoses (11)	Bolt, clamp for charge air hose to charge- air distributor	*BA09.41-P-1002-01X
37	Remove left low-pressure line with service connection (9) and right low-pressure line (14) from center low-pressure line (12) and seal openings with suitable stop plugs	: Always replace hoses with clamps after opening the clamps. Leaks can occur otherwise. Commercially available devices/tools Clamping pliers
		Bolt, fuel line clamp to engine/bracket	*BA07.03-P-1004-01H
		Record plug	Fig 1
38	Remove center low-pressure line (12)	Bolt, fuel line clamp to engine/bracket	*BA07.03-P-1004-01H
39	Check center low-pressure line (12) for damage	Assembly cleaner If a problem arises ↓ Replace center low-pressure line (12).	*BR00.45-Z-1028-04A
40	Remove brackets from center low-pressure line (12)	When replacing center low-pressure line (12).
41	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
42	Perform an engine test run and check engine for proper operation and leaktightness
43	Install upper engine cover		AR01.10-P-2405XGA