Remove/install rack-and-pinion steering

AR46.20-P-0600MFA

Remove/install rack-and-pinion steering

22.07.2019

Model

118, 177, 247

Modification notes

18.07.2019

Release and disconnect electrical connectors and remove electrical wiring harnesses.

Operation steps 9 and 10.

18.07.2019

Remove longitudinal member reinforcements.

Operation step 21.

Shown on model 177.0

4

Front axle carrier

14

Screw

5

Bolts

15

Connecting carrier

7

Bolts

16

Bolts

8

Screw

18

Expansion rivet

10

Rack-and-pinion steering

19

Bolts

12

Front support

22

Bracket

13

Lower front wheel arch cover

9

Bolts

10

Rack-and-pinion steering

Shown on model 177.0

11

Nuts

Shown on model 177.0

10

Rack-and-pinion steering

17

Heat shield

21

Electrical connectors

20

Soundproofing

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

 Danger

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

 Warning

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

Topical note

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

AH00.00-P-0020-01A

Topical note

Notes on bolted connections with self tapping screws

AH00.00-P-0007-01SF

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW

Notes on repair work on suspension components

AH00.00-P-0100-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

 

Remove/install

1

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

2

Disconnect steering coupling.

AR46.10-P-8000-01MFA

 Clamp screw, steering coupling to rack-and-pinion steering

*BA46.10-P-1001-01H

 Retainer device

*129589012100

3

Remove front wheel and tire assemblies.

AR40.10-P-1102MFA

4

Remove lower engine compartment paneling.

Model 118, 177, 247 with engine 608, 654

AR61.20-P-1105MFE

Model 118, 177 with engine 139
Model 118, 177, 247 with engine 260, 282

AR61.20-P-1105MFA

5

Detach lower transverse control arm from steering knuckle at left and right.

AR33.20-P-0510MFA

6

Detach tie rod joint from steering knuckle at left and right.

AR46.40-P-0200-02MFA

 Nut, tie rod to steering knuckle

*BA46.40-P-1001-01Q

 Press

*163589034300

 Repair spindle

*221589003303

 Puller

*221589003300

7

Detach torsion bar linkage from torsion bar at left and right.

AR32.35-P-3330MFA

 Nut, torsion bar linkage to suspension strut/stabilizer bar

*BA32.35-P-1002-02A

8

Remove fender liners in front fenders.

AR88.10-P-1301MFA

9

Release and disconnect electrical connector at left front body acceleration sensor (B24/3) or right front body acceleration sensor (B24/4) and remove electrical wiring harness from front axle carrier (4).

Model 118, 177, 247
with code 459 (Steel suspension with adjustable damping)
Model 118, 177, 247
with code 640 (SAE dynamic LED headlamps, right-hand traffic)
Model 118, 177, 247
with code 641 (Dynamic LED headlamps, left-hand traffic)
Model 118, 177, 247
with code 642 (Dynamic LED headlamps, right-hand traffic)

10

Release and disconnect electrical connector from left front level sensor (B22/8) or right front level sensor (B22/9) and remove electrical wiring harness from front axle carrier (4).

Model 118, 177, 247
with code 459 (Steel suspension with adjustable damping)
Model 118, 177, 247
with code 640 (SAE dynamic LED headlamps, right-hand traffic)
Model 118, 177, 247
with code 641 (Dynamic LED headlamps, left-hand traffic)
Model 118, 177, 247
with code 642 (Dynamic LED headlamps, right-hand traffic)

11

Remove expansion rivets (18).

 Dismantling tool

*000589956300

12

Remove screws (19) and remove front support (12) with lower front wheel arch covers (13).

13

Detach bracket (22) of exhaust system from front axle carrier (4).

 Model 118, 177, 247 with engine 654Nut, front exhaust system holder to front axle carrier

*BA49.10-P-1006-02V

 Model 118, 177, 247 with engine 608Nut, center exhaust system holder to front axle carrier

*BA49.10-P-1004-02R

 Model 118, 177 with engine 139Nut, center exhaust system holder to front axle carrier

*BA49.10-P-1002-02X

 Model 118, 177, 247 with engine 260, 282Nut, center exhaust system holder to front axle carrier

*BA49.10-P-1007-02Q

14.1

Remove control unit of temperature sensor upstream of gasoline particulate filter (B163/4) from holder at front axle carrier (4) and secure it on vehicle free of tension with temperature sensor connected to prevent it from falling down.

Model 177, 247 with engine 260, 282
with code 598 (Gasoline particulate filter (OPF) with sensor system)
except code M005 (4MATIC)

AR49.20-P-0009MFD


Do not crush or kink or subject lines to tension.
This will result in damage to the lines which may impair their functional capability.

 The temperature sensor upstream of the gasoline particulate filter (B163/4) remains in the exhaust system and is permanently connected to the control unit.

14.2

Detach control unit of NOx sensor downstream of SCR catalytic converter (N37/8) from bracket on front axle carrier (4) and secure on vehicle free of tension to prevent it falling with line connected.

Model 118, 177, 247 with engine 608

AR49.20-P-2062MFE


Do not crush or kink or subject lines to tension.
This will result in damage to the lines which may impair their functional capability.

 The NOx sensor downstream of the SCR catalytic converter (N37/8b1) remains in the exhaust system and is permanently connected to the control unit of the NOx sensor downstream of the SCR catalytic converter (N37/8).

15

Release and disconnect electrical connectors (21) at rack-and-pinion steering (10).

16

Unclip electrical line of electrical connectors (21) from heat shield (17).

17

Remove nuts (11).

18

Remove bracket from right connecting carrier.

Model 118, 177 with engine 139
Model 118, 177, 247 with engine 260, 282, 608, 654
with code 228 (Auxiliary heater)

 Screw, holder to connecting carrier

*BA62.30-P-1010-02O

19

Remove screws (7, 16) and remove left and right connecting carriers (15) from vehicle.

 Bolt, connecting carrier to front axle carrier/radiator support

*BA62.30-P-1003-02O

20

Support front axle carrier (4) and secure to prevent it falling.

AR01.10-P-2500-01A



000 588 03 62 00 Lifting platform

WS01.00-P-0091A

 Use lifting platform in combination with major assembly mount (universal).

21

Remove longitudinal member reinforcements at left and right transverse control arm bearing.

Model 118, 177 with engine 139
Model 118, 177, 247 with engine 260
with code M016 (Uprated engine)

 Installation: Replace screws of transverse control arm bearing at front axle carrier.

 Mount, support (strut)

*BA33.10-P-1002-01R

 Screw/bolt, transverse control arm bearing to front axle carrier

*BA33.15-P-1002-01F

22

Remove lower engine stabilizer mount.

Model 118, 177 with engine 139

AR22.10-P-1155MFG

Model 118, 177, 247 with engine 260, 282

AR22.10-P-1155MFC

Model 118, 177, 247 with engine 608, 654

AR22.10-P-1155MFE

23

Remove screws (14).

 Bolt, front-axle carrier to body

*BA33.10-P-1001-01R

24

Remove bolts (5).

 Bolt, front-axle carrier to body

*BA33.10-P-1001-01R

25

Remove screws (8) and lower front axle carrier (4).



000 588 03 62 00 Lifting platform

WS01.00-P-0091A

 Use lifting platform in combination with major assembly mount (universal).

 Installation: Replace screws (8).

 Screw/bolt, transverse control arm bearing to longitudinal member

*BA33.15-P-1003-01F

26

Remove side noise encapsulations (20).

If the noise encapsulations (20) are installed.

27

Remove nuts of screws (9) and remove rack-and-pinion steering (10) from front axle carrier (4).

 Installation:
Position precisely. The rack-and-pinion steering (10) must not slip on the front axle carrier (4).
Otherwise the elastomer bearings of the rack-and-pinion steering (10) could be trapped or damaged.

 Installation: Replace screws (9) and nuts.
Observe information sheet for repair kit.
Fit assembly aid from repair kit onto screws (9) and insert screws (9) into front axle carrier (4) from below. Then position rack-and-pinion steering (10) on front axle carrier (4) from above.

 Nut, rack-and-pinion steering to front axle carrier

*BA46.20-P-1001-01T

28

Remove heat shield (17) from rack-and-pinion steering (10).

When replacing the rack-and-pinion steering (10).

 Bolt, heat shield to rack-and-pinion steering

*BA46.20-P-1002-01T



Check

29

Check elastomer bearings on rack-and-pinion steering (10).

 Commercially available devices/tools
Stationary press with suitable sleeves or pillars

Lubricant, rubber assembly 1 l

*BR00.45-Z-1010-06A

If damage or wear is present,



replace elastomer bearings.

AR46.20-P-0600-04MFA

30

Check rack-and-pinion steering (10).

If an accident vehicle has been repaired.

Evaluating steering gear when repairing accident vehicles

AH46.20-P-9409-01A

31

Install in the reverse order.

Concluding tasks

32

Perform chassis alignment.

AR40.20-P-0200MFA

 Front axle stabilizer bar

Number

Designation

Model 118, 177, 247

BA32.35-P-1002-02A

Nut, torsion bar linkage to suspension strut/stabilizer bar

M12

Nm

105

 Front axle carrier

Number

Designation

Model 118, 177, 247

BA33.10-P-1001-01R

Bolt, front-axle carrier to body

M12

Nm

100

M14

Stage 1

Nm

200

Stage 2 = loosen screws

°

180

Stage 3

Nm

200

 Front axle carrier

Number

Designation

Model 118, 177, 247

BA33.10-P-1002-01R

Mount, support (strut)

Nm

45

 Trailing arms, transverse control arms

Number

Designation

Model 118, 177, 247

BA33.15-P-1002-01F

Screw/bolt, transverse control arm bearing to front axle carrier

M10

Stage 1

Nm

50

Stage 2

°

90

 Trailing arms, transverse control arms

Number

Designation

Model 118, 177, 247

BA33.15-P-1003-01F

Screw/bolt, transverse control arm bearing to longitudinal member

M10

Stage 1

Nm

60

Stage 2

°

45

 Steering shaft

Number

Designation

Model 118

Model 177

BA46.10-P-1001-01H

Clamp screw, steering coupling to rack-and-pinion steering

Nm

28

28

 Steering shaft

Number

Designation

Model 247

BA46.10-P-1001-01H

Clamp screw, steering coupling to rack-and-pinion steering

Nm

28

 Steering gear

Number

Designation

Model 118, 177, 247

BA46.20-P-1001-01T

Nut, rack-and-pinion steering to front axle carrier

Stage 1

Nm

40

Stage 2

°

180

 Steering gear

Number

Designation

Model 118, 177, 247

BA46.20-P-1002-01T

Bolt, heat shield to rack-and-pinion steering

Nm

17

 Front axle tie rod

Number

Designation

Model 118, 177, 247

BA46.40-P-1001-01Q

Nut, tie rod to steering knuckle

Stage 1

Nm

90

Stage 2

°

90

 Exhaust system

Number

Designation

Engine 139 in model 118, 177, 247

BA49.10-P-1002-02X

Nut, center exhaust system holder to front axle carrier

Nm

20

 Exhaust system

Number

Designation

Model 247 with engine 608

Model 118 with engine 608

BA49.10-P-1004-02R

Nut, center exhaust system holder to front axle carrier

M8

Nm

20

20

 Exhaust system

Number

Designation

Model 177 with engine 608

BA49.10-P-1004-02R

Nut, center exhaust system holder to front axle carrier

M8

Nm

20

 Exhaust system

Number

Designation

Engine 654 in model 118

Engine 654 in model 177

BA49.10-P-1006-02V

Nut, front exhaust system holder to front axle carrier

M8

Nm

20

20

 Exhaust system

Number

Designation

Engine 654 in model 247

BA49.10-P-1006-02V

Nut, front exhaust system holder to front axle carrier

M8

Nm

20

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 118 with engine 282

BA49.10-P-1007-02Q

Nut, center exhaust system holder to front axle carrier

M8

Nm

20

20

 Exhaust system

Number

Designation

Model 177 with engine 260

Model 177 with engine 282

BA49.10-P-1007-02Q

Nut, center exhaust system holder to front axle carrier

M8

Nm

20

20

 Exhaust system

Number

Designation

Model 247 with engine 260

Model 247 with engine 282

BA49.10-P-1007-02Q

Nut, center exhaust system holder to front axle carrier

M8

Nm

20

20

 Frond end with front reinforcement

Number

Designation

Model 118

Model 177

BA62.30-P-1003-02O

Bolt, connecting carrier to front axle carrier/radiator support

M8

Nm

16

16

 Frond end with front reinforcement

Number

Designation

Model 247

BA62.30-P-1003-02O

Bolt, connecting carrier to front axle carrier/radiator support

M8

Nm

16

 Frond end with front reinforcement

Number

Designation

Model 118

Model 177

BA62.30-P-1010-02O

Screw, holder to connecting carrier

M6

Nm

6

6

 Frond end with front reinforcement

Number

Designation

Model 247

BA62.30-P-1010-02O

Screw, holder to connecting carrier

M6

Nm

6

Repair materials

Number

Designation

Order number

BR00.45-Z-1010-06A

Lubricant, rubber assembly 1 l

A 000 989 03 67