Remove/install engine with front axle carrier - AR01.10-P-2500LFB

ENGINE 157, 278 in MODEL 217, 222 

Shown on vehicle without 4MATIC with engine 278 

Shown on MODEL 222 without 4MATIC with engine 278 

Shown on model 222 up to 29.04.14 without 4MATIC with engine 278 

Shown on MODEL 222 without 4MATIC with engine 278 

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on fitting hydraulic lines and hoses		AH32.50-P-0001-02A
	Notes on AIRmatic		AH32.22-P-1000-02LF
	Notes on Active Body Control suspension		AH32.50-P-0001-01LF
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Remove/install
1.1	Relieve pressure completely in the front suspension struts using the diagnostic system	ENGINE 157, 278 in MODEL 217, 222 without CODE 487 (Active Body Control (ABC))
			AD00.00-P-2000-04B
1.2	Relieve pressure in system for Active Body Control (ABC)	ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))	AR32.50-P-0001-01LF
2	Deactivate easy entry/exit feature	Disabling takes place via the buttons on the steering wheel in the "Comfort" menu of the multifunction display, see vehicle-operator's manual.
3	Turn front wheels to straight-ahead position and secure steering wheel with holding device	Retainer device	Figure
4	Set DIRECT SELECT gear selector switch to position "N" and release parking brake
5	Detach ground line from battery		AR54.10-P-0003LF
	Notes on battery		AH54.10-P-0001-01A
6	Secure vehicle on vehicle lift	Vehicle hoist securing tool	Figure
7	Remove lower engine compartment paneling		AR61.20-P-1105LF
8	Remove bracket (21) for rear engine compartment paneling
9	Remove underride guard on the left and right	ENGINE 157, 278 in MODEL 222 with CODE Z07 (Top protection)	AR61.40-P-1001LFS
10	Drain coolant at radiator		AR20.00-P-1142LF
11	Remove engine covers (1)
12	Remove engine compartment covers (3a, 3b, 3c)
13	Remove both air filter housings (4)		AR09.10-P-1150LFB
14	Empty air conditioning system, evacuate		AR83.30-P-1760LF
15	Suction off oil from expansion reservoir (ABC) (5)	Vehicles with code (487) Active Body Control (ABC) Hand pump	Fig 7
16	Detach hydraulic hose ABC (6) from expansion reservoir ABC (5) and close off with grommets	Vehicles with code (487) Active Body Control (ABC) Record plug	Figure
17	Detach hydraulic hose ABC (6) from expansion reservoir ABC (5), set aside and fasten with the cable tie to the engine
18	Disconnect refrigerant line (7) at engine compartment connecting point and close off openings with stop plugs	Record plug	Figure
19	Fasten refrigerant line (7) in engine compartment with a cable tie to engine
20	Detach purge line (8) on purging switchover valve
21	Detach vacuum line (9) at firewall and fasten with cable tie to the engine
22	Disconnect engine wiring harness on the vehicle side		AR01.00-P-2410-02LFB
23	Remove catalytic converters (22)		AR49.10-P-7100LF
24	Detach steering coupling (23) on lower steering shaft	ENGINE 157, 278 in MODEL 217 ENGINE 157, 278 in MODEL 222 as of 4/30/14	AR46.10-P-8000LW
		ENGINE 157, 278 in MODEL 222 up to 4/29/14 The steering wheel must not be turned when the steering coupling (23) has been detached. The clock spring contact will be destroyed otherwise.	AR46.10-P-8000RK
25	Secure radiator and fan unit (24) with a tensioning strap against falling down
26	Detach coolant vent line (10) and fasten to the side
27	Unlock grommet on coolant hose from low-temperature circuit switchover valve to oil cooler, pull out grommet downwards and drain coolant from the low-temperature circuit
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
28	Disconnect coolant hose (11) for low-temperature circuit and fasten to one side
29	Disconnect coolant hose (12) for low-temperature circuit and fasten to one side		AR20.20-P-7441-01RQ
30	Remove upper coolant hose (13)		AR20.20-P-7441-01RQ
31	Disconnect coolant hose (14) at coolant line for ATL
32	Disconnect coolant hose from low-temperature circuit switchover valve (Y73/1) to engine at connecting point
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
33	Disconnect both coolant hoses (15, 16) at oil cooler (17)		AR20.20-P-7441-01RQ
34	Remove screw/bolt (18) at fan unit (24)
35	Disconnect coolant hose (19) at firewall		AR20.20-P-7441-01RQ
36	Remove low-temperature circuit cooler (25) in wheel well at the front right		AR20.20-P-7441-01RQ
37	Remove bottom coolant hose (26)		AR09.41-P-1311-01AL
38	Unhook Low-temperature circuit circulation pump 1 (M43/6) at bracket
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
39	Disconnect electrical connections (27, 28) on actuator motor of the electric power steering
40	Detach electrical line (29) for electric power steering on front axle carrier (30)
41	Disconnect electrical connection (39) on low-temperature circuit switchover valve (Y73/1)
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
42	Detach coolant hose from low-temperature circuit switchover valve (Y73/1) at low-temperature circuit circulation pump 1 (M43/6)
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
43	Detach bracket at front axle carrier (30)
44	Fasten low-temperature circuit switchover valve (Y73/1), low-temperature circuit circulation pump 1 (M43/6) and fasten all coolant hoses in the area to the side in the wheel well
	Notes on routing of coolant hoses	Location of components, see note on routing the coolant hoses.	AH20.20-P-1000-01LF
45	Detach oil cooler (17) at fan unit (24) and fasten with a cable tie to engine	Do not disconnect oil lines at oil cooler (17).
46	Detach engine oil lines (31, 32) at engine oil cooler, close off with grommet and tie up with cable tie to engine	Record plug	Figure
47	Detach lower refrigerant line on condenser for the A/C	ENGINE 157, 278 in MODEL 217 ENGINE 157, 278 in MODEL 222.0/1	AR83.30-P-6540LF
48	Disconnect ABC hydraulic line at connecting point on front right suspension strut and close off openings with grommet	ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))	AR32.50-P-0024SX
		Record plug	Figure
49	Release fender liner in from left front wheel well in the front area		AR88.10-P-1300LF
50	Detach ABC hydraulic lines (33, 34) at valve block and close off openings with grommet	ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))	AR32.50-P-0001LF
		Record plug	Figure
51	Fasten ABC hydraulic line (33) to engine	Vehicles with code (487) Active Body Control (ABC)
52	Detach rpm sensors at steering knuckles		AR42.30-P-0712LF
53	Detach brake wear indicator contact sensor at brake caliper	Only present in the right brake caliper.
54	Disconnect electrical connection of the brake wear indicator contact sensor	ENGINE 157, 278 in MODEL 217, 222 with CODE M005 (4MATIC) Only present in the right brake caliper.
55	Remove bracket for electrical lines for rpm sensors	ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))
56	Unclip electrical lines for rpm sensors and the brake wear indicator contact sensor from holders and fasten in wheel well
57	Unclip brake lines from brackets on suspension struts
58	Detach brake caliper from brake caliper supports and fasten with attached brake lines in wheel well		AR42.10-P-0070LF
59	Unclip bracket at front axle carrier (30)
60	Disconnect electrical connections at the suspension struts	ENGINE 157, 278 in MODEL 217, 222 with CODE M005 (4MATIC) without CODE 487 (Active Body Control (ABC))
61	Detach upper transverse control arm to steering knuckles		AR33.20-P-0500LF
62	Detach suspension struts at the steering knuckles	ENGINE 157, 278 in MODEL 217, 222 without CODE 487 (Active Body Control (ABC))	AR32.25-P-1017LFB
		ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))	AR32.25-P-1017LFA
63	Detach ground line (38) to body
64	Relieve fuel pressure over diagnostic socket		AR07.03-P-1460-01VA
		Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01E
		Pressure hose	Figure
65	Detach fuel line (20) at diagnostic socket and close off openings with grommets	Union nut, fuel line to fuel distributor	*BA07.03-P-1001-01E
		Record plug	Figure
66	Support front axle carrier (30) with lifting platform and aggregate mount and secure whole engine transmission unit against slipping and falling down with a tensioning strap	When doing so ensure that mounting plates are evenly aligned.
67	Remove rear engine crossmember (35) with the rear engine mount	Never use impact wrench/driver or compressed air tools for screwing in or unscrewing the screw/bolts. Otherwise the threads can get damaged.	AR22.10-P-1180LF
68	Apply colored marking of the propeller shaft position to the transmission output flange.	For installation restore of the works-side installation position. Drive train vibrations can occur otherwise.
69	Detach propeller shaft (36) from transmission output flange		AR41.10-P-0050LF
70	Remove screw/bolts (37) from longitudinal members	Replace screw/bolts (37).
		Screw/bolt, front axle carrier at rear to longitudinal member	*BA33.10-P-1002-01P
		Screw/bolt, front axle carrier at front to longitudinal member	*BA33.10-P-1001-01P
71	Lower engine transmission unit with front axle carrier (30)	The engine and transmission must not impact on the body panels or major assemblies, lines and hoses must not be pinched or put under tension. Damage can otherwise occur.
72	Install in the reverse order
73	Check cooling system for leaktightness		AR20.00-P-1010LF
74	Fill and bleed active body control (ABC)	ENGINE 157, 278 in MODEL 217, 222 with CODE 487 (Active Body Control (ABC))	AR32.50-P-0021SX
75	Perform wheel alignment check		AR40.20-P-0200LF
76	Read out fault memory using the diagnostic system and clear if necessary
			AD00.00-P-2000-04B
	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
77	Carry out an engine test run, checking the engine for proper operation and leaktightness

Number	Designation		ENGINE 157	ENGINE 278
BA07.03-P-1001-01E	Union nut, fuel line to fuel distributor	Nm	22	22

Number	Designation				MODEL 217	MODEL 222 except CODE Z07
BA33.10-P-1001-01P	Screw/bolt, front axle carrier at front to longitudinal member	Stage 1		Nm	140	140
		Stage 2	Loosen	∠°	-	-
		Stage 3		Nm	-	-
		Stage 4		∠°	-	-

Number	Designation				MODEL 222 with CODE Z07
BA33.10-P-1001-01P	Screw/bolt, front axle carrier at front to longitudinal member	Stage 1		Nm	100
		Stage 2	Loosen	∠°	-180
		Stage 3		Nm	140
		Stage 4		∠°	45

Number	Designation				MODEL 217	MODEL 222 except CODE Z07
BA33.10-P-1002-01P	Screw/bolt, front axle carrier at rear to longitudinal member	Stage 1		Nm	70	70
		Stage 2	Loosen	∠°	-	-
		Stage 3		Nm	-	-

Number	Designation				MODEL 222 with CODE Z07
BA33.10-P-1002-01P	Screw/bolt, front axle carrier at rear to longitudinal member	Stage 1		Nm	100
		Stage 2	Loosen	∠°	-180
		Stage 3		Nm	140