Remove/Install Front Axle Upper Control Arm - AR33.20-P-0500RG

Model 190 

Fig 1: Front Axle Upper Control Arm Components Location - Model 190 (Shown Except Code M032)

Courtesy of MERCEDES-BENZ USA

Shown on model 190 except code M032 (Black Series version) 

Shown on model 190 with code M032 (Black Series version) 

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Remove
1	Remove front suspension strut (1).		AR32.25-P-1017RG
		While working on the front axle care must be taken to ensure that the surfaces of aluminum components do not get any scratches, cracks and notches. Otherwise, the service life of the components will be reduced.
2	Unscrew screw (3) and detach holder of level control system from upper transverse control arm (2).
3	Unscrew screw (4) and detach holder of brake hose from upper transverse control arm (2).
4.1	Detach nut (7) and pry upper ball joint (8) off steering knuckle (9).	Model 190 except code M032 (Black Series version)	AR33.20-P-0500-01RQ
		Thrust piece	Fig 4
		Press	Fig 3
		Puller	Fig 2
4.2	Remove screws (10), detach holder (12) with upper transverse control arm (2) from steering knuckle (9) and remove adjusting plate (11).	Model 190 with code M032 (Black Series version)
5	Secure steering knuckle (9) against tilting.	Do not tension, kink or crush brake hose and electrical lines. Damage may occur otherwise.
6	Detach nuts (5), remove screws (6) and remove upper transverse control arm (2).	The transverse control arm brackets may only be detached from the bodyshell or the bodywork for repairs! Otherwise, the threads on the frame may be damaged.
	Check
7	Check upper transverse control arm (2) and upper ball joint (8) for damage.	If there is damage. ↓ Replace upper transverse control arm (2).
	Install
8	Install upper transverse control arm (2), screw in screws (6) and attach nuts (5).	Bolt, upper transverse control arm to body	*BA33.20-P-1001-01P
9.1	Install new holder (12) with adjusting plate (11) on steering knuckle (9) and screw in screws (10).	Model 190 with code M032 (Black Series version)
		When replacing the upper transverse control arm (2).
		Screw, upper transverse control arm holder to steering knuckle	*BA33.20-P-1008-01P
9.2	Attach adjusting plate (11) and holder (12) to steering knuckle (9) and screw in screws (10).	Model 190 with code M032 (Black Series version)
		When reusing the upper transverse control arm (2).
		Screw, upper transverse control arm holder to steering knuckle	*BA33.20-P-1008-01P
10.1	Install upper ball joint (8) in holder (12) and attach nut (7).	Model 190 with code M032 (Black Series version) When replacing the upper transverse control arm (2).
		Nut, upper transverse control arm to steering knuckle	*BA33.20-P-1002-01P
10.2	Install upper ball joint (8) in steering knuckle (9) and attach nut (7).	Model 190 except code M032 (Black Series version)
		Nut, upper transverse control arm to steering knuckle	*BA33.20-P-1002-01P
11	Attach holder of brake hose to upper transverse control arm (2) and screw in screw (4).
12	Attach holder of level control system to upper transverse control arm (2) and screw in screw (3).
13	Install front suspension strut (1).		AR32.25-P-1017RG
	Measure
14	Perform chassis alignment.		AR40.20-P-0200RQ

Fig 2: Identifying Puller (221 589 00 33 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Press (163 589 03 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Thrust Piece (129 589 10 63 00)

Courtesy of MERCEDES-BENZ USA