Remove/install spring control arm on front axle - AR33.15-P-0170SXS

MODEL 221.1 with CODE (Z07) Top protection

Fig 1: Identifying Front Axle Spring Control Arm Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	When working on the front-end assembly, be careful not to scratch, mark or notch the surfaces of aluminum parts. Otherwise the service life of the parts will be affected
	Notes on AIRmatic		AH32.22-P-1000-02SX
	Only tighten nuts and bolts of chassis components when vehicle is in a ready-to-drive condition.
1	Completely discharge pressure in suspension strut using STAR DIAGNOSIS
2	Remove front wheel
	Remove/install wheels		AP40.10-P-4050SX
3	Remove bottom engine compartment paneling		AR61.20-P-1105SXS
4	Unclip electrical lines (1) of front axle damping valve units from cable holders (2, 3)
5	Detach both retaining brackets (4) from front axle carrier (7)		AR32.20-P-0300SX
6	Secure stabilizer bar (6) to suitable location using cable tie
7	Undo nut (17b)	Do not twist bolt (17a). When loosening the nut (17b), it is essential to counterhold the bolt (17a), otherwise the lock tabs for camber adjustment in the rubber mount will be sheared off. Screw on the nut (17b) of the bolt (17a) until it makes contact, but do not yet tighten in order to allow the rubber mount to turn when the vehicle is rocked to settle the suspension. Do not tighten the nut (17b) until the vehicle is in the ready-to-drive condition.
7	Undo nut (17b)		*BA33.20-P-1005-01M
8	Unscrew nut (17d) and remove bolt (17c) from spring control arm (17)		*BA32.25-P-1007-04L
9	Detach spring control arm (17) from steering knuckle (5).		AR33.15-P-0170-01SX
10	Pull bolt (17a) out of front axle carrier (7) and lower spring control arm (17) to remove
	Checking
11	Check rubber bushing in spring control arm (17) for damage.	If necessary: Replace spring control arm (17).
12	Check rubber boots and ball joints in spring control arm (17) for damage	If necessary: Replace spring control arm (17).
13	Install in the reverse order
14	Perform a wheel alignment check

WHEEL LOCATION, HUB

Number	Designation				Model 221 with code Z07/Z07+Z19
BA33.20-P-1005-01M	Self-locking nut, spring control arm to front axle carrier		Stage 1	Nm	80
		Hexagon	Stage 2	∠°	180
		Torx	Stage 2	∠°	180

STRUTS

Number	Designation			Model 221 with code Z07/Z07+Z19
BA32.25-P-1007-04L	Nut, front suspension strut to spring control arm	M14	Nm	-
BA32.25-P-1007-04L	Nut, front suspension strut to spring control arm	M16	Nm	165