Remove/install the suspension strut

AR32.25-P-1017ME

Remove/install the suspension strut

29.04.2020

Model

167

except code 489 (AIRMATIC)

except code 490 (Electrohydraulic suspension)

Model

167

with code 489 (AIRMATIC)

except code 490 (Electrohydraulic suspension)

Modification notes

29.04.2020

Air suspension pressure line to suspension strut

BA32.22-P-1005-03B

Shown on model 167 with code 489 (AIRMATIC) except 490 (Electrohydraulic suspension)

1

Suspension strut

7

Bracket

12

Upper transverse control arm

2

Pneumatic pressure line

8

Steering knuckle

13

Nut

3

Nut

9

Tie rod

14

Nut

4

Bracket

10

Front axle shaft

15

Screw

5

Electrical connectors

11

Stabilizer bar linkage

16

Lower control arm

6

Electrical connector

 Warning

Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension

Use only approved tensioning devices; additionally screen off hazardous area if necessary. Check special tools for damage and proper operation (visual inspection). Wear protective gloves.

AS00.00-Z-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

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

AH00.00-P-0020-01A

Topical note

Notes on air suspension

AH32.22-P-1000-01T

Evaluation of elastomer bearings

AH00.10-P-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

Remove front left or right wheel and tire assembly.

AR40.10-P-1102ME

2

Transfer the pneumatic pressure of suspension strut (1) into the central reservoir using the diagnostic system.

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)



AD00.00-P-2000-06ME


The complete wheels must not touch the ground.
Otherwise the suspension struts (1) can be predamaged and subsequently malfunction.

 Select menu item "Actuations" in active suspension and damping system control unit.

 Installation: Transfer pneumatic pressure out of the central reservoir into suspension strut (1) using the diagnostic system.

3

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

4

Open hood and remove covers over suspension strut (1) at top.

5

Detach pneumatic pressure line (2) from suspension strut (1) and seal openings with suitable stop plugs.

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)


Do not stretch, crush or kink pneumatic pressure line (2).
This will result in damage to pneumatic pressure line (2) and can impair its function.

 Before beginning repair work, clean the area around the pneumatic pressure line connections. Do not use any cleaning agents or solvents.

 Air suspension pressure line at suspension strut at front

*BA32.22-P-1005-03B

 Box wrench bit

*001589000300

 Record plug

*129589009100

 Socket wrench bit

*211589000900

6

Remove nuts (3) at top from suspension strut (1).

 Nut, shock absorber on front end

*BA32.25-P-1001-01O

7

Remove holder (4) with sensor and electrical wiring harness and place to one side.

8.1

Unhook left front level sensor from upper transverse control arm (12).

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
When removing the left suspension strut (1).

AR82.10-P-0006ME

8.2

Unhook right front level sensor from upper transverse control arm (12).

When removing the right suspension strut (1).

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 613 (headlights left-hand-traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 620 (Right-hand traffic headlamps)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 631 (Static LED headlamps, left-hand traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 632 (Headlamps, LED, static, right-side traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 640 (SAE dynamic LED headlamps, right-hand traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 641 (Dynamic LED headlamps, left-hand traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167
with code 642 (Dynamic LED headlamps, right-hand traffic)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)

AR82.10-P-0006ME

9

Release electrical connectors (5), disconnect and remove from suspension strut (1).

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)

 The number of electrical connectors (5) varies depending on the vehicle equipment.

10

Disconnect electrical connector (6) and expose wiring harness of steering knuckle (8) and suspension strut (1).


Do not crush or kink or subject electric lines to tension.
This will result in damage to the electric lines and can impair their function.

11

Detach holder (7) from suspension strut (1) and place to one side with electrical wiring harnesses.

 The design of holder (7) varies depending on the vehicle equipment.

12

Detach tie rod (9) from steering knuckle (8).

AR46.40-P-0200ME

13

Release front axle shaft (10) from steering knuckle (8).

Model 167 with engine 176, 177, 256.9
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167 with engine 176, 177, 256.9
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167 with engine 264
with code 489 (AIRMATIC)
with code M005 (Vehicles with 4MATIC/all-wheel drive)
except code 490 (Electrohydraulic suspension)
Model 167 with engine 264
with code M005 (Vehicles with 4MATIC/all-wheel drive)
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)

AR33.30-P-0620MSC

Model 167 with engine 654.9, 656
except code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)
Model 167 with engine 654.9, 656
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)

AR33.30-P-0620OID

14

Detach torsion bar linkage (11) from steering knuckle (8).

AR32.35-P-3330ME

15

Remove nut (13) from upper transverse control arm (12).

 Self-locking nut, upper ball joint out of upper transverse control arm to steering knuckle

*BA33.20-P-1001-01W

16

Detach upper transverse control arm (12) from steering knuckle (8).

17

Secure suspension strut (1) using suitable means to prevent it from falling down.

18

Remove nut (14) and screw (15).

 Self-locking nut, shock absorber to wishbone

*BA32.25-P-1002-01O

19

Push steering knuckle (8) downward and remove suspension strut (1).

 Helper required.

20

Check pneumatic pressure line (2) and pneumatic pressure line connection at top of suspension strut (1) for damage.

Model 167
with code 489 (AIRMATIC)
except code 490 (Electrohydraulic suspension)

If there is a problem,



repair corresponding component part.

AR32.22-P-2001-01ME

 Air suspension pressure line at suspension strut at front

*BA32.22-P-1005-03B

 Box wrench bit

*000589750300

 Knife

*000589122800

 Box wrench bit

*001589000300

 Socket wrench bit

*211589000900



Check

21

Check elastomer bearing in lower control arm (16) for wear and damage.

If there is a problem,



Replace elastomer bearing.

AR32.25-P-0107ME

22

Check suspension strut (1) for damage.

If there is a problem,



replace suspension strut (1).

23

Install in the reverse order.

 Air suspension

Number

Designation

Model 167
with code 489 (AIRMATIC)

BA32.22-P-1005-03B

Air suspension pressure line at suspension strut at front

Nm

2

 Front axle shock absorber

Number

Designation

Model 167

BA32.25-P-1001-01O

Nut, shock absorber on front end

Nm

50

 Front axle shock absorber

Number

Designation

Model 167

BA32.25-P-1002-01O

Self-locking nut, shock absorber to wishbone

Stage 1

Nm

100

Stage 2

°

180

 Wheel control, hub

Number

Designation

Model 167

BA33.20-P-1001-01W

Self-locking nut, upper ball joint out of upper transverse control arm to steering knuckle

Stage 1

Nm

75

Stage 2

°

45