Remove/install upper control arm

AR33.20-P-0500EQ

Remove/install upper control arm

22.03.2019

Model

293

1

Cover

6

Nuts

2

Cover

10

Nut

3

Engine compartment cover

K40/8

Engine fuse and relay module

5

Coolant expansion reservoir

Shown on left side of vehicle

4

Transverse control arm

7

Retaining clamp

8

Nut

9

Steering knuckle

11

Screw

Topical note

Notes on handling, transport and storage of composite brake disks

AH42.10-P-9406-12LF

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

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 (1).

When removing the upper transverse control arm (4) on the right.

1.2

Remove cover (2).

When removing the upper transverse control arm (4) on the left.

2

Remove engine compartment cover (3).

3

Disconnect ground line and positive line of on-board electrical system battery.

When removing the upper transverse control arm (4) on the passenger side.

AR54.10-P-0003EQ

4

Unclip coolant expansion reservoir (5).

When removing the right upper transverse control arm (4).

5

Detach nuts (6) and remove engine fuse and relay module (K40/8) and place to one side with lines connected.

When removing the upper transverse control arm (4) on the driver's side.

6

Remove suspension strut concerned.

AR32.25-P-1017LW

7

Detach retaining clamp (7) with front level sensor from upper transverse control arm (4).

When removing the left upper transverse control arm (4).

 Pay attention to installation position.

8

Unscrew nut (8).


Counterhold the ball head and do not use an impact wrench/driver.
Otherwise, the ball head or steering knuckle (9) will be damaged.

 Nut, steering knuckle to transverse control arm

*BA33.20-P-1006-01U

9

Detach upper transverse control arm (4) from steering knuckle (9).

10

Secure the steering knuckle (9) with a cable tie.

11

Detach nuts (10) from screws (11).

 Nut, transverse control arm to body

*BA33.20-P-1005-01U

12

Pull out screws (11).

13

Remove upper transverse control arm (4).



Check

14

Check elastomer bearings on upper transverse control arm (4) for wear and damage.

In the event of a problem,



Replace upper transverse control arm (4).

15

Check upper ball joint on upper transverse control arm (4) for wear and damage.

In the event of a problem,



Replace upper transverse control arm (4).

16

Check upper transverse control arm (4) for damage.

In the event of a problem,



Replace upper transverse control arm (4).

17

Install in the reverse order.

 Wheel control, hub

Number

Designation

Model 293

BA33.20-P-1005-01U

Nut, transverse control arm to body

Stage 1

Nm

35

Stage 2

°

90

 Wheel control, hub

Number

Designation

Model 293

BA33.20-P-1006-01U

Nut, steering knuckle to transverse control arm

Stage 1

Nm

50

Stage 2

°

45