Remove/Install Right Fuel Rail - AR07.03-P-1012WA

Engine 276.8 in model 172

Courtesy of MERCEDES-BENZ USA

Fig 1: Right Fuel Rail Components Location - Engine 276.8 In Model 172

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	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
	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
	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
	Remove
1	Detach battery ground line		AR54.10-P-0003W
2	Remove left and right air filter housing		AR09.10-P-1150RKA
3	Remove soundproofing from left rail
4	Remove soundproofing from right rail (1)
5	Relieve fuel pressure over diagnostic socket		AR07.03-P-1460-01VA
5	Relieve fuel pressure over diagnostic socket	Pressure hose	Fig 4
6	Relieve fuel pressure over fuel system high-pressure circuit		AR07.03-P-1460-02MM
7	Remove crash plate for high-pressure pump		AR07.02-P-1020WA
8	Remove bracket (9)
9	Unscrew high-pressure line (8) from right rail (1)	Do not kink or bend high-pressure line (8). Otherwise leaks and damage can occur.
10	Unscrew high-pressure line (8) from left rail	Do not kink or bend high-pressure line (8). Otherwise leaks and damage can occur.
11	Remove high-pressure line (10)	Do not kink or bend high-pressure line (10). Otherwise leaks and damage can occur.
12	Detach low-pressure line (4) at high-pressure pump	Do not kink or bend low-pressure line (4). Otherwise leaks and damage can occur.
13	Remove screw/bolt (5)
14	Remove screw (6)
15	Unscrew screw/bolt (7)
16	Release and disconnect electrical connections on fuel injectors (Y76) on the right rail (1)		AR07.03-P-0004W
17	Release and disconnect electrical connections for ignition coils at right cylinder bank		AR15.12-P-2003W
18	Remove screw/bolts (1s) by turning each one through half a turn	Begin in the center of the right rail (1) and work outwards. Otherwise damage to the right rail (1) can occur.
19	Remove hold-down device (3) between rail (1) and fuel injectors (Y76)
20	Mark fuel injectors (Y76) of right rail (1) relative to the respective cylinder	When reusing the fuel injectors (Y76) on the right rail (1).
21	Detach the right rail (1) from fuel injectors (Y76) of the right rail (1)
22	Remove Fuel injectors (Y76) of the right rail (1)	Engine oil which comes out during disassembly of the right rail (1) or from the fuel injectors (Y76) of the right rail (1) is safe. The right rail (1) or the fuel injectors (Y76) of the right rail (1) can be reused. Fuel injectors (Y76) of the right rail (1) must be pulled out, since the right rail (1) can only be inserted together with the fuel injectors (Y76) of the right rail (1). In the case of jammed fuel injectors (Y76) on the right rail (1) ↓ Remove fuel injectors (Y76) of the right rail (1).	AR07.03-P-0004W
			AR07.03-P-0004-03MM
		Puller	Fig 3
	Clean
23	Clean the fuel connections on the fuel injectors (Y76) of the right rail (1)	During cleaning the fuel connections must be held downwards. This ensures that no dirt gets into the openings. Assembly cleaner	*BR00.45-Z-1028-04A
	Check
24	Check high-pressure lines (8, 10) and replace if necessary		AR07.03-P-1010-03MM
24	Check high-pressure lines (8, 10) and replace if necessary	The sealing cone for the high-pressure lines (8, 10) must be checked before assembly. Otherwise leaks and damage can occur. Assembly cleaner	*BR00.45-Z-1028-04A
	Install
25	Replace sealing packages for the fuel injectors (Y76) on right rail (1)		AR07.03-P-0004-02MM
		Assembly cleaner	*BR00.45-Z-1028-04A
		Drift	Fig 5
26	Replace sealing rings (11) on fuel injectors (Y76) of right rail (1)
27	Replace sealing rings (12) on fuel injectors (Y76) of right rail (1)
28	Replace sealing rings (13) on fuel injectors (Y76) of right rail (1)		AR07.03-P-0004-01MM
		Assembly cleaner	*BR00.45-Z-1028-04A
		Assembly tool	Fig 2
29	Replace seal (2) on overflow connector of the right rail (1)
30	During removal of marked fuel injectors (Y76) on the right rail (1), insert in the right rail (1) and fasten with hold-down tools (3)	When reusing the fuel injectors (Y76) on the right rail (1). The fuel injectors (Y76) of the right rail (1) must be inserted into the cylinder in which it was previously installed. Fuel injectors (Y76) of the right rail (1) may only be installed again in combination with the right rail (1) (as a unit). Replace Hold-down tool (3).
31	Push new fuel injectors (Y76) of the right rail (1) into the right rail (1) and fasten with hold-down tools (3)	When replacing the fuel injectors (Y76) of the right rail (1). Replace Hold-down tool (3). Fuel injectors (Y76) of the right rail (1) may only be installed again in combination with the right rail (1) (as a unit).
32	Push the right rail (1) with fuel injectors (Y76) of the right rail (1) into the cylinder head
33	Screw in screw/bolts (1s) alternately each by half a revolution	Begin in the center of the right rail (1) and work outwards. Otherwise the right rail (1) will be damaged. Screw/bolt, fuel distributor to cylinder head cover	*BA07.52-P-1001-01G
34	Put on and lock electrical connections for ignition coils on the right cylinder bank		AR15.12-P-2003W
35	Put on and lock electrical connections on fuel injectors (Y76) on the right rail (1)		AR07.03-P-0004W
36	Screw in screw/bolts (7)	Screw/bolt, fuel line service connection to cylinder head cover	*BA07.03-P-1003-01D
37	Screw in screw/bolts (6)	Screw/bolt, fuel line holder to cylinder head cover	*BA07.03-P-1004-01D
38	Screw in screw/bolts (5)	Screw/bolt, additional bracket for high-pressure line to high pressure pump drive housing	*BA07.03-P-1006-01D
39	Mount low-pressure line (4) on high-pressure pump	Do not kink or bend low-pressure line (4). Otherwise leaks and damage can occur. Union nut, fuel line to high-pressure pump	*BA07.03-P-1002-01D
40	Install high-pressure line (10)	Do not kink or bend high-pressure line (10). Otherwise leaks and damage can occur. Union nut, fuel line to high-pressure pump	*BA07.03-P-1002-01D
40	Install high-pressure line (10)	Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01D
41	Mount high-pressure line (8) on left rail	Do not kink or bend high-pressure line (8). Otherwise leaks and damage can occur. Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01D
42	Mount high-pressure line (8) on right rail (1)	Do not kink or bend high-pressure line (8). Otherwise leaks and damage can occur. Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01D
43	Install bracket (9)
44	Install crash plate for high-pressure pump		AR07.02-P-1020WA
45	Mount cap on diagnostic socket	Cap on service connection	*BA07.03-P-1007-01D
46	Install soundproofing for right rail (1)
47	Install soundproofing on left rail
48	Install left and right air filter housing		AR09.10-P-1150RKA
49	Mount ground line to battery		AR54.10-P-0003W
50	Read out fault memory using the diagnostic system and clear if necessary
			AD00.00-P-2000-04A
	Check
51	Check fuel high-pressure circuit for leak tightness.		AR07.03-P-1010-04MM
	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
52	Carry out an engine test run, checking the engine for proper operation and leak tightness