Remove/install suspension strut - AR32.25-P-1017MCU

MODEL 451.3/4 

Fig 1: Identifying Suspension Strut Remove/Install Components (1 Of 2)

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Fig 2: Identifying Suspension Strut Remove/Install Components (2 Of 2)

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	Remove/install
	Risk of injury  caused by pinching or crushing  when working on springs or spring bodies that are under tension	Use only approved tensioning devices; shield off hazard area if necessary. Inspect special tools for damage and proper operation (visual inspection). Wear protective gloves.	AS00.00-Z-0001-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
		Daimler AG has not specifically called for the suspension struts (1) to be changed in pairs, but it is advisable.
1	Remove brake carrier with mounted brake caliper 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. : Press brake pedal several times until the brake linings make contact with the brake disk.	AR42.10-P-0500MCU
2	Unscrew screw (2) and pull the left front rpm sensor (L6/1) or right front rpm sensor (L6/2) out of the steering knuckle (3)
3	Using a suitable tool unclip the bracket (4) on the suspension strut (1) and place the left front rpm sensor (L6/1) or right front rpm sensor (L6/2) to one side
4	Unscrew nut (5) and unhook link rod (6) from suspension strut (1)	Counterhold threaded stud of link rod (6). Screwdriver bit	Fig 3
		Tool assortment for stabilizer assembly	Fig 4
			*BA32.20-P-1004-02I
5	Unscrew nut (7) and release tie rod end (8) from steering knuckle (3) using puller and remove	Carefully press out tie rod end (8). Otherwise, the rubber boot may be damaged. : Check rubber boot for damage, if necessary, replace tie rod end (8). Puller	Fig 6
		007	*BA46.40-P-1001-01F
6	Unscrew nut (9) and using puller release flange ball joint (10) from steering knuckle (3)	Carefully press out flange ball joint (10). Otherwise the rubber boot may be damaged and the transverse control arm will have to be replaced. Counterhold the flange ball joint's threaded pin (10) using a Torx wrench (size T40). : Check rubber boot for damage and replace transverse control arm, if necessary. Puller	Fig 10
			*BA33.25-P-1001-01D
7	Undo nut (11) and remove bolt (12) from steering knuckle (3)		*BA32.25-P-1003-04D
8	Mount clamping device (13) onto steering knuckle (3), insert retaining pin (14) into the bolt bore in the steering knuckle (3) and spread the steering knuckle (3) using the expansion bolt (15)	Tighten the expansion bolt (15) only until resistance is felt, do not overtighten. Otherwise the clamping device (13) or steering knuckle (3) may be damaged. Push steering knuckle (3) all the way upwards to the end stop. Tensioning device	Fig 8
9	Detach steering knuckle (3) from suspension strut (1)	Push the transverse control arm on the front axle down only as far as absolutely necessary. Otherwise the rubber bushings in the transverse control arm may be damaged.
10	Lower vehicle with vehicle lift
11	Unscrew nut (16) and remove suspension strut (1)	Do not turn the piston rod of the suspension strut (1). Otherwise the suspension strut (1) may be damaged. Push the transverse control arm on the front axle down only as far as absolutely necessary. Otherwise the rubber bushings in the transverse control arm may be damaged. Counterhold the piston rod of the suspension strut (1) using a Torx bit (size T45) and a shank length of 100 mm. If the nut (16) has seized, push back the boot, attach the holding device (17) to the piston rod of the suspension strut (1) and counterhold using the open end wrench (18). Open end wrench	Figure
		Assembly tool set	Figure
		Holding device	Figure
			*BA32.25-P-1002-04D
12	Install in the reverse order

FRONT AXLE STABILIZER BAR

Number	Designation		Model 451.3/4
BA32.20-P-1004-02I	Nut, link rod to suspension strut	Nm	58

SUSPENSION STRUTS

Number	Designation			Model 451.3/4
BA32.25-P-1002-04D	Nut, suspension strut to rebound buffer		Nm	45
BA32.25-P-1003-04D	Bolt, fastening shackle of suspension strut to swiveling bearing	Stage 1	Nm	30
		Stage 2	∠°	180

AXLE HOUSING, STEERING KNUCKLE

Number	Designation		Model 451.3/4
BA33.25-P-1001-01D	Nut, flange ball joint to swivel bearing	Nm	50

TIE ROD

Number	Designation		Model 451.3/4
BA46.40-P-1001-01F	Self-locking nut, tie rod to steering knuckle	Nm	34

Fig 3: Identifying Screwdriver Bit (126 589 00 10 00)

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Fig 4: Identifying Tool Assortment For Stabilizer Assembly (450 589 00 17 00)

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Fig 5: Identifying Open End Wrench (450 589 01 01 00)

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Fig 6: Identifying Puller (450 589 01 33 00)

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Fig 7: Identifying Assembly Tool Set (450 589 08 99 00)

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Fig 8: Identifying Tensioning Device (451 589 00 31 00)

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Fig 9: Identifying Holding Device (451 589 00 63 00)

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Fig 10: Identifying Puller (454 589 00 33 00)

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