Remove/install front axle - AR33.10-P-0100MCC

MODEL 451.3/4

Fig 1: Identifying Front Axle Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Front Axle Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
1	Remove brake carrier (1) with mounted brake caliper (2) from front axle and hang up to one side with attached brake hose	Do not remove brake linings. Slightly push back brake linings, if necessary using a suitable tool. * not for USA	AR42.10-P-0500MCC
		* for USA only : Press brake pedal several times until the brake linings make contact with the brake disk.	AR42.10-P-0500MCU
2	Remove bolts (3), and pull left front rpm sensor (L6/1) and right front rpm sensor (L6/2) out of steering knuckle
3	Using a suitable tool unclip bracket (4) on left and right suspension strut, place left front rpm sensor (L6/1) and right front rpm sensor (L6/2) to one side
4	Remove underfloor panels	Rechargeable drill/screwdriver
5	Loosen nut (5) on steering coupling (6)	Turn the front wheels onto lock until the nut (5) is accessible.	*BA46.10-P-1001-01F
6	Lower vehicle with vehicle lift
7	Place the front wheels in the straight-ahead position and block the steering wheel using the holding device	Steering wheel must be locked. Otherwise the fanfare horns and airbag clock spring contact may be damaged. Holding device	Fig 3
8	Raise vehicle with vehicle lift
9	Unscrew nut (5) on the steering coupling (6), remove bolt (7) and slide steering coupling (6) upwards and remove from the rack-and-pinion steering (8)	Only the bolt (7) and nut (5) approved for model 451 may be used. Bolts and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection. When the nut (5) is loosened, the cam-shaped bolt (7) rotates with it approx. half a revolution. However, the bolt (7) does not have to be counterheld. Check the steering coupling (6) for ease of movement and replace if necessary.
10	Disconnect connector of power steering torque sensor (B23x1)	For vehicles with code (V26) Power steering, EPS (FFO)
11	Disconnect power steering connector (M19x1)	For vehicles with code (V26) Power steering, EPS (FFO)
12	Ground; disconnect interference suppression of power steering pump (W30/2)	For vehicles with code (V26) Power steering, EPS (FFO)
13	Support front axle carrier (9) with transmission jack and removal fixture and secure with tensioning strap	Removal fixture Transmission jack 0.5 t	Figure
14	Remove bolts (10) from front axle carrier (9)	: Screw in bolts (10) and remove transmission jack with removal fixture. Slide front axle carrier (9) into the foremost position and align centrally in this position, then tighten bolts (10).	*BA33.10-P-1001-01D
15	Unscrew nut (14) on left and right suspension strut	Do not turn the piston rod of the suspension strut. Otherwise the suspension strut may be damaged. Counterhold the piston rod of the suspension strut using a Torx bit (size T45) and a shank length of 100 mm. If the nut (14) is seized slide back boot, fasten holding device ( 15) on the piston rod of the suspension strut and counterhold with open end wrench ( 16).	*BA32.25-P-1002-04D
		Open end wrench	Fig 4
		Assembly tool set	Fig 6
		Holding device	Fig 7
16	Raise vehicle with the vehicle lift and pull front axle forward under the vehicle	Aid of helper required.
17	Loosen tensioning strap, remove front axle from transmission jack and removal fixture	Aid of 2 helpers required.
18	Install in the reverse order
19	Perform wheel alignment check	Depending on the workshop equipment select between the measurement variant with recording the vehicle level or without recording the vehicle level. without recording the vehicle level	AR40.20-P-0200MCC
		with recording the vehicle level	AR40.20-P-0200MCE