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

Model 290 

Shown on right side of vehicle except code 489 (AIRMATIC) 

Fig 1: Front Axle Upper Control Arm Components Location - Model 290 (Shown On Right Side Except Code 489)

Courtesy of MERCEDES-BENZ USA

Shown on model 290.### 1# on left side of vehicle 

Courtesy of MERCEDES-BENZ USA

Shown on model 290.### 1# on right side of vehicle 

Courtesy of MERCEDES-BENZ USA

Notice	Notes on handling, transport and storage of ceramic brake disks		AH42.10-P-9406-13A
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
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 safety-relevant components		AH00.00-Z-0019-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Remove/install
1.1	Remove cover (5).	When removing right upper transverse control arm (2).
1.2	Remove the cover (6).	When removing left upper transverse control arm (2).
2.1	Remove on-board electrical system battery.	When removing right upper transverse control arm (2) on front passenger side.
		Model 290 except code U98 (LITHIUM-ION STARTER BATTERY (LISB))	AR54.10-P-0009FRY
		Model 290 with code U98 (LITHIUM-ION STARTER BATTERY (LISB))	AR54.10-P-0009FRX
2.2	Remove on-board electrical system battery for 48 V on-board electrical system.	When removing right upper transverse control arm (2) on front passenger side.
		Model 290 with code B01 (48V technology)	AR54.10-P-0022FR
3.1	Remove coolant expansion reservoir (8) with connected lines and place to one side.	When removing right upper transverse control arm (2) on front passenger side.
3.2	Remove engine fuse and relay module (K40/8) and place to one side with connected lines.	When removing left upper transverse control arm (2) on driver's side.
4	Remove corresponding front wheel.		AR40.10-P-1102A
5	Secure steering knuckle (3) against falling down.
6	Unscrew nut (4).	Counterhold the ball head and do not use an impact wrench/driver. Otherwise the ball head or steering knuckle (3) may be damaged.
		Nut, steering knuckle to transverse control arm	*BA33.20-P-1006-01U
7	Remove upper transverse control arm (2) from steering knuckle (3).
8	Remove front suspension strut.	Model 290 with code 489 (AIR BODY CONTROL)	AR32.25-P-1017FRA
9	Remove front right level sensor retaining clamp (1) from upper transverse control arm (2).	Pay attention to installation position.
10	Remove front left level sensor retaining clamp from upper transverse control arm (2).	Pay attention to installation position.
11	Push cable duct (11) slightly to one side.	When removing right upper transverse control arm (2) on front passenger side.
12	Counterhold screws (10) and unscrew nuts (9).
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
		Nut, transverse control arm to body	*BA33.20-P-1005-01U
13	Remove bolts (10).
14	Remove upper transverse control arm (2).
	Check
15	Check elastomer bearing at upper transverse control arm (2) for wear and damage.
	Evaluation of elastomer bearings		AH00.10-P-0001-01A
		In the event of a problem, ↓ Replace upper transverse control arm (2).
16	Check upper ball joint at upper transverse control arm (2) for wear and damage.	In the event of a problem, ↓ Replace upper transverse control arm (2).
17	Check upper transverse control arm (2) for damage.	In the event of a problem, ↓ Replace upper transverse control arm (2).
18	Install in the reverse order.