Remove/install front engine mount and/or engine support - AR22.10-P-1260GQ

ENGINE 276.9 in MODEL 166, 251 

Fig 1: Identifying Front Engine Mount/Engine Support Remove/Install Components - Illustrated On Model 166.0

Courtesy of MERCEDES-BENZ USA

Illustrated on model 166.0 

	Remove/install
	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
	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 bolted connections with self tapping screws		AH00.00-P-0007-01SF
1	Detach ground line from battery	ENGINE 276.9 in MODEL 251	AR54.10-P-0003RT
	Notes on battery		AH54.10-P-0001-01A
		ENGINE 276.9 in MODEL 166 For removing right-hand engine mount (7)	AR54.10-P-0003GZ
2	Remove front engine cover
3.1	Remove air filter housing with engine air intake duct upstream of air filter	For removing right-hand engine mount (7)
		Bolt, air filter to cylinder head cover	*BA09.10-P-1001-01M
		Bolt, air filter to air intake pipe support brace	*BA09.10-P-1002-01M
3.2	Remove ME-SFI [ME] control unit	For removing left-hand engine mount (7)
			AR07.08-P-7008GQ
4	Remove section of the left, center and right partition wall
5.1	Unfasten shield (2a)	For removing right-hand engine mount (7)
			AR14.10-P-4095GQ
5.2	Unfasten bracket (1) for ME-SFI [ME] control unit with shield (2)	For removing left-hand engine mount (7)
			AR14.10-P-4095GQ
6.1	Remove right oxygen sensor upstream of catalytic converter (G3/4)	For removing right-hand engine mount (7)
			AR07.52-P-5303GQ
6.2	Remove left oxygen sensor upstream of catalytic converter (G33)	For removing left-hand engine mount (7)
			AR07.52-P-5303GQ
7.1	Remove shield (2a)	For removing right-hand engine mount (7)
			AR14.10-P-4095GQ
7.2	Remove bracket (1) for ME-SFI [ME] control unit with shield (2)	For removing left-hand engine mount (7)
			AR14.10-P-4095GQ
8.1	Remove heat shield (3a) over engine mount (7) at engine support	For removing right-hand engine mount (7)
		Bolt, heat shield to engine support	*BA22.10-P-1003-02A
8.2	Detach heat shield (3) over engine mount (7) at engine support and set aside or remove	For removing left-hand engine mount (7) Model 166: the heat shield (3) and engine mount (7) can only be removed/installed together. Model 251: the heat shield (3) can removed individually.
		Bolt, heat shield to engine support	*BA22.10-P-1003-02A
9	Mount engine hoist and raise engine slightly	ENGINE 276.9 in MODEL 251	AR33.10-P-0100-01RT
		ENGINE 276.9 in MODEL 166 Only raise engine sufficiently that the engine mount (7) is not under tension.	AR33.10-P-0105EW
		ENGINE 276.9 in MODEL 251	*BA62.30-P-1008-01E
		Engine lifting device	Fig 2
10	Remove corresponding underfloor paneling	ENGINE 276.9 in MODEL 251	AR61.30-P-1001RT
		ENGINE 276.9 in MODEL 166	AR61.30-P-1001GQ
11	Unscrew screw/bolts (6) for engine mounts (7) on front axle carrier	ENGINE 276.9 in MODEL 251	*BA22.10-P-1001-03F
		ENGINE 276.9 in MODEL 166	*BA22.10-P-1001-03G
12	Remove screw/bolts for engine support on engine mounts (7)	ENGINE 276.9 in MODEL 251	*BA22.10-P-1002-03F
		ENGINE 276.9 in MODEL 166	*BA22.10-P-1002-03G
		Engine mount wrench set	Fig 3
13	Raise engine	Pay attention when lifting out engine that no cables and lines are damaged and that engine does not lean against the bulkhead.
14.1	Remove screw/bolt from A/C compressor at engine support	For removing left-hand engine mount (7)
		Bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
14.2	Detach alternator and place to one side with the lines connected	Only model 166 with 4MATIC, model 251 For removing right-hand engine mount (7)
		Bolt, alternator to timing case	*BA15.40-P-1001-01F
15	Remove screw/bolt for ground line on engine support	Vehicles without 4MATIC For removing right-hand engine mount (7)
16	Take out engine mount (7)	Always replace engine mount (7) in pairs. Ensure that the correct installation position is obtained when assembling the engine mount (7). Pay attention to environmental protection regulations for disposal of engine mounts (7). Dispose engine mounts (7) into mixed scrap.
17	Detach and remove engine support on cylinder crankcase	Bolt, engine support to crankcase	*BA22.10-P-1001-02A
18	Install in the reverse order

AIR FILTER

Number	Designation		ENGINE 276.9
BA09.10-P-1001-01M	Bolt, air filter to cylinder head cover	Nm	9

AIR FILTER

Number	Designation		ENGINE 276.9
BA09.10-P-1002-01M	Bolt, air filter to air intake pipe support brace	Nm	9

ALTERNATOR

Number	Designation		ENGINE 276
BA15.40-P-1001-01F	Bolt, alternator to timing case	Nm	20

ENGINE SUPPORT (ENGINE SIDE)

Number	Designation			ENGINE 276
BA22.10-P-1001-02A	Bolt, engine support to crankcase	Stage 1	Nm	20
		Stage 2	∠°	90

ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)

Number	Designation		MODEL 251
BA22.10-P-1001-03F	Bolt, front engine mount to front axle carrier	Nm	53

ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)

Number	Designation		MODEL 166 with ENGINE 276, 642, 651
BA22.10-P-1001-03G	Bolt, front engine mount to front axle carrier	Nm	53

ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)

Number	Designation		MODEL 251
BA22.10-P-1002-03F	Bolt, front engine mount to engine support	Nm	53

ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)

Number	Designation			MODEL 166 with ENGINE 276, 642, 651
BA22.10-P-1002-03G	Bolt, front engine mount to engine support	Stage 1	Nm	53
		Stage 2	∠°	-

ENGINE SUPPORT (ENGINE SIDE)

Number	Designation		ENGINE 276
BA22.10-P-1003-02A	Bolt, heat shield to engine support	Nm	13

CROSSMEMBER AND FRONT REINFORCEMENT

Number	Designation		MODEL 251
BA62.30-P-1008-01E	Bolt, partition wall reinforcement between wheel well liners to fender	Nm	10

REFRIGERANT COMPRESSOR

Number	Designation		ENGINE 276
BA83.55-P-1001-01M	Bolt, refrigerant compressor to timing case/crankcase/engine support	Nm	20

Fig 2: Identifying Engine Lifting Device (240 589 00 61 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Engine Mount Wrench Set (001 589 01 16 00)

Courtesy of MERCEDES-BENZ USA