Remove/install oil separator - AR01.20-P-9750MTA

ENGINE 133 in MODEL 117, 156, 176

Fig 1: Oil Separator Remove/Install Components (1 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 2: Oil Separator Remove/Install Components (2 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 3: Oil Separator Remove/Install Components (3 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 4: Oil Separator Remove/Install Components (4 Of 4)

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove engine compartment paneling		AR61.20-P-1105NKB
2	Empty low-temperature circuit		AR20.00-P-1144MTA
3	Remove exhaust intermediate pipe (1)		AR49.10-P-7100MTA
4	Remove right side shaft heat shield (3)
5	Remove integral carrier heat shield (2)
6	Detach oil drain (4) at crankcase	Replace sealing ring.
6	Detach oil drain (4) at crankcase	Bolt, bleed line for oil separator to crankcase	*BA01.20-P-1004-01R
7	Detach wide open throttle vent lines (5) at crankcase	Replace sealing ring.
7	Detach wide open throttle vent lines (5) at crankcase	Screw/bolt, crankcase ventilation system vent line to crankcase	*BA01.20-P-1005-01R
8	Remove screw/bolts (6)	Screw/bolt, oil separator to crankcase	*BA01.20-P-1002-01R
9	Remove air filter housing		AR09.10-P-1150MTA
10	Remove battery carrier		AR54.00-P-0002NKB
11	Remove charge air hose downstream of charge air cooler (28)		AR09.41-P-8619MTA
12	Detach vent line (30) from coolant expansion reservoir for low-temperature circuit	Hose clamp pliers	Figure
13	Remove screw/bolts (, 7) and coolant return line (8) at charge air cooler (28)		AR09.41-P-1311-01AL
14	Disconnect electrical connection at pressure sensor upstream of throttle valve (B28/6), expose electrical wiring harness and place to one side
15	Remove coolant line (9)
16	Detach partial load vent line (13) from oil separator (29)
17	Disconnect purge line (10) at fuel tank ventilation and detach at charge air cooler (28)	Replace sealing ring.
18	Detach purge lines (10, 11) at throttle valve actuator (M16/6) as well as bracket (12) and remove upwards	Install new sealing rings.
19	Disconnect electrical connection at purging pressure sensor (B4/4).
20	Detach filler neck (14) from cylinder head cover	Replace seal. Pay attention to correct routing of vacuum hoses (15). The vacuum line to the ATL aneroid capsule must not be unclipped at the oil filler neck bracket otherwise it must lie loosely beside.
20	Detach filler neck (14) from cylinder head cover	Screw/bolt, filler neck to cylinder head cover	*BA01.20-P-1003-01R
21	Detach purge line (16) at charge air cooler (28) and expose	Replace seal.
22	Detach wide open throttle vent line (5) from bracket (17) and expose	Replace seals.
23	Unfasten edge guard at partition wall and place to one side
24	Remove screw/bolts (27) and remove oil separator (29) with attached vent lines (5, 18) upwards	Screw/bolt, oil separator to cylinder head cover	*BA01.20-P-1007-01R
25.1	Detach wide open throttle vent line (5) from oil separator (29)	Engine 133 in model 117, 156, 176 except code 494 (US version)
25.1			AR01.20-P-0002MTA
25.2	Replace oil separator (29) with wide open throttle vent line (5)	Engine 133 in model 117, 156, 176 with code 494 (US version) The wide open throttle vent line (5) and the oil separator (29) are firmly connected together over a key-lock connection. Therefore the oil separator (29) and the wide open throttle vent line (5) must be replaced after disconnection of the connection.
26	Install in the reverse order
27	Read out fault memory using the diagnostic system and clear if necessary
			AD00.00-P-2000-04A
	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
28	Carry out engine test run and check engine for leaktightness while it is running