Remove/Install Oil Separator On Cylinder Head Cover - AR01.20-P-9691MRD

Engine 274.9 in model 213

except code 494 (US version)

except code 945 (China Stage 6 exhaust treatment)

Engine 274.9 in model 238

except code 945 (China Stage 6 exhaust treatment)

Shown on engine 274.920

Fig 1: Oil Separator On Cylinder Head Cover Components Location - Engine 274.920 In Model 213

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown on engine 274.910

	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 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 threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
NOTICE	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	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
	Remove
1	Remove upper engine cover
2	Remove soundproofing	Engine 274.9 in model 213 except code 494 (US version) except code 920 (Direct fuel injection with stratified charging) except code 945 (China Stage 6 exhaust treatment) Engine 274.9 in model 238 except code 920 (Direct fuel injection with stratified charging) except code 945 (China Stage 6 exhaust treatment)	AR94.30-P-5410MRD
3	Release and disconnect electrical connection from fuel system high pressure pump
4	Detach cable duct on the cylinder head cover, shielding (4) and oil separator (1) and raise slightly
5	Remove shielding (4)	Tightening procedure for high-pressure pump shielding Unfasten shielding (4) against the tightening procedure.	AR07.02-P-0815-01MR
6	Relieve fuel pressure in fuel system high-pressure circuit		AR07.03-P-1460-02MM
7	Remove high-pressure line (5)	Do not kink or bend high-pressure line (5). Otherwise damage and leaks can occur.
		Box wrench bit	Fig 2
8	Remove oil separator (1) from cylinder head cover
9	Remove center and rear lower engine compartment paneling		AR61.20-P-1105LWE
10	Remove bleed line (6) from crankcase
11	Remove oil separators (1)
	Install
12	Install oil separator (1)
13	Mount bleed line (6) with new seal on crankcase	Bolt, bleed line for oil separator to crankcase	*BA01.20-P-1004-01R
14	Mount oil separator (1) with new seal on cylinder head cover	Screw/bolt, oil separator to cylinder head cover	*BA01.20-P-1007-01R
15	Check sealing cone on high-pressure line (5)		AR07.03-P-1010-03MM
		Assembly cleaner	*BR00.45-Z-1028-04A
16	Install high-pressure line (5)		AR07.03-P-1010-02MR
		Union nut, fuel line to high-pressure pump	*BA07.03-P-1002-01F
		Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01F
		Box wrench bit	Fig 2
17	Install shielding (4)	Tightening procedure for high-pressure pump shielding	AR07.02-P-0815-01MR
		Bolt for high-pressure pump shielding	*BA07.02-P-1004-01D
		Set of torque tools	Fig 3
18	Mount cable duct on cylinder head cover, shielding (4) and oil separator (1)	M6 X 1	*BA00.10-P-1002-04A
19	Put together electrical connection on fuel system high pressure pump, until it is locked
20	Install soundproofing	Engine 274.9 in model 213 except code 494 (US version) except code 920 (Direct fuel injection with stratified charging) except code 945 (China Stage 6 exhaust treatment) Engine 274.9 in model 238 except code 920 (Direct fuel injection with stratified charging) except code 945 (China Stage 6 exhaust treatment)	AR94.30-P-5410MRD
	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
21	Carry out an engine test run, checking the engine for proper operation and leaktightness
22	Install center and lower engine compartment paneling		AR61.20-P-1105LWE
23	Install upper engine cover

METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number	Designation		8.8	10.9
BA00.10-P-1002-04A	M6 X 1	Nm	9	13

CRANKCASE VENTILATION SYSTEM, CYLINDER HEAD COVER, CAMSHAFT HOUSING

Number	Designation		Engine 274
BA01.20-P-1004-01R	Bolt, bleed line for oil separator to crankcase	Nm	9

CRANKCASE VENTILATION SYSTEM, CYLINDER HEAD COVER, CAMSHAFT HOUSING

Number	Designation		Engine 274
BA01.20-P-1007-01R	Screw/bolt, oil separator to cylinder head cover	Nm	9

HIGH PRESSURE PUMP

Number	Designation		Engine 274
BA07.02-P-1004-01D	Bolt for high-pressure pump shielding	Nm	20

INJECTION NOZZLES, INJECTION VALVES, LINES

Number	Designation			Engine 274
BA07.03-P-1001-01F	Union nut, fuel line to fuel distributor	Stage 1	Nm	15
		Stage 2	∠°	75
		Stage 3	∠°	25

INJECTION NOZZLES, INJECTION VALVES, LINES

Number	Designation			Engine 274
BA07.03-P-1002-01F	Union nut, fuel line to high-pressure pump	Stage 1	Nm	15
		Stage 2	∠°	75
		Stage 3	∠°	25

Fig 2: Identifying Box Wrench Bit (000 589 80 03 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Set Of Torque Tools (230 589 00 99 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

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