Remove/install spring control arm on front axle

AR33.15-P-0170I

Remove/install spring control arm on front axle

13.4.11

17.8.04

Torque for nut on spring control arm on steering knuckle changed from 80 Nm to 50 Nm and 60 °.

Model 215 only

*BA33.20-P-1012-01A

Torque for nut, spring control arm to front axle carrier changed from 150 Nm to 80 Nm 120 °.

Model 215 only

*BA33.20-P-1014-01A

9.12.04

If the rubber boot of the stabilizer bar pivot bushing is damaged, the stabilizer bar pivot bushing (and not the spring control arm) has to be replaced.

Operation steps 4.1, 10.1

 

Remove/install

 Danger!

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between four pillars of hoist and position four support plates at hoist mounting points specified by vehicle manufacturer.

AS00.00-Z-0010-01A



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

1

Raise vehicle with vehicle lift

2

Remove front wheel



Remove/install wheels

AP40.10-P-4050Z

3

Detach torque strut (18) from steering knuckle (5)

 Installation: Install new nut (18b).

AR33.15-P-0160-01I

 Thrust piece

*140589006300

 Puller

*220589003300

 Press

*163589034300

 Check rubber boot on ball head of torque strut (18) for damage. If rubber boot is damaged, install new torque strut (18):



Remove/install torque strut

AR33.15-P-0160I

4.1

Unscrew nut (23c) and pry link rod (23) off spring control arm (17).

Vehicles with AIRmatic (semi-active air suspension), code 489

 Installation: Press link rod (23) onto hexagon of stabilizer bar pivot bushing at spring control arm (17).



*BA32.20-P-1001-02H

 Check rubber boot of stabilizer bar pivot bushing of link rod (23) at spring control arm (17) for damage, install new stabilizer bar pivot bushing if necessary: 

Fit new stabilizer bar pivot bushing.

AR32.20-P-0310M

5

Remove bolts (40c) from spring strut (40)

 Installation: After tightening the bolts (40c) must be flush with the suspension strut (40) or slightly recessed.



*BA32.25-P-1002-04B

6

Using a suitable lever, loosen spring strut (40) at ball joint

 Check rubber boot of ball joint for damage and install new spring control arm (17) if necessary.

7

Press spring control arm (17) out of steering knuckle (5)

 Installation: Replace self-locking nut (17b).

AR33.15-P-0170-01I

 Thrust piece

*140589006300

 Puller

*220589003300

 Press

*163589034300

 Model 215

*BA33.20-P-1012-01A

 Model 220

*BA33.20-P-1005-01F

8.1

Remove the pressure-supply circuit's valve body from the right side of the front subframe and tie it to one side

Vehicles with Active Body Control (ABC) code 487, when removing right spring control arm (17).

9

Remove track control arm (17) from front subframe.

 Do not twist bolt (17a). Always counter the bolt (17a) when slackening the nut (17c), otherwise the locating tabs for camber adjustment in the rubber bushing of spring control arm (17) will be sheared off.

 Installation: Screw nut (17c) all the way onto bolt (17a) but do not tighten, so that the rubber bushing of spring control arm (17) can turn when the suspension is compressed. Do not tighten nut (17c) until in ready-to-drive condition.

 Model 215

*BA33.20-P-1014-01A

 Model 220

*BA33.20-P-1001-01F



Checking

10.1

Check rubber boot of stabilizer bar pivot bushing at spring control arm (17) for damage.

 If rubber boot is damage, install new stabilizer bar pivot bushing: 

Fit new stabilizer bar pivot bushing.

AR32.20-P-0310M

11

Check rubber bushing in spring control arm (17) for damage.

Replace rubber mount if necessary:



Extract/press in rubber mount on spring control arm.

AR33.15-P-0170-02I

 Extraction and insertion tool

*220589064300

 Puller

*124589043300

Stationary workshop press 65 t



Rubber mount on spring control arm with thrust plates

Model 215, 220

BT33.15-P-0001-01A

12

Install in the reverse order

13

Perform wheel alignment check

AR40.20-P-0200I

Number

Designation

Models
220 except
220.083/
084/087/
183/184/
187

BA32.20-P-1001-02H

Nut, link rod to spring control arm

Nm

150

Number

Designation

Model 215

Model
220.025/026/028/063/
065/067/070/073/074/
075/125/126/128/163/
165/167/170/173/174/
175/176/178/179

BA32.25-P-1002-04B

Bolt, front suspension strut to spring control arm

Nm

20

20

Number

Designation

Model
215

BA33.20-P-1012-01A

Self-locking nut, track control arm to stub axle

Stage 1

Nm

50

Stage 2

°

60

BA33.20-P-1014-01A

Self-locking nut, spring control arm to front axle carrier

Stage 1

Nm

80

Stage 2

°

120

Number

Designation

Model
220 without code Z07 except model 220.08/18 /8

BA33.20-P-1001-01F

Self-locking nut, spring control arm to front axle carrier

Stage 1

Nm

80

Stage 2

°

120

BA33.20-P-1005-01F

Self-locking nut, track control arm to stub axle

Stage 1

Nm

50

Stage 2

°

60