Remove/install rack-and-pinion steering

AR46.20-P-0600M

Remove/install rack-and-pinion steering

6.12.10



Removing

Danger!

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

Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.

AS00.00-Z-0010-01A

 Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

Danger!

Risk of injury to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning caused by swallowing hydraulic fluid

Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

 Danger!

Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof

Keep body parts and limbs well clear of moving parts.

AS00.00-Z-0011-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Evaluating steering rack when repairing accident vehicles

AH46.20-P-9409-01A

1

Deactivate easy entry/exit function

 Otherwise the driver seat and steering wheel move into a different position if the driver door is opened or closed for example. Damage to the upper frame can occur when the holding device is installed.

 Disabling takes place via the buttons on the steering wheel in the "Comfort" menu of the multifunction display, see owner's manual.

2

Turn steering wheel to center position (front wheels in straight-ahead position) and fix in place with holding device

 On a disengaged steering coupling (25) the steering wheel should not be turned because the spiral contact coil will be destroyed.

 Holding device

*129589012100

3

Open engine hood

AR88.40-P-1000M

4

Suction off oil from expansion reservoir of power steering

 Hand pump

*210589007100

5

Lift vehicle on lifting platform.

6

Remove front wheels



Remove/install wheels

AP40.10-P-4050Z

7

Remove lower engine compartment paneling

AR61.20-P-1105M

8

Press tie rod joints (10a) off steering knuckles

AR46.40-P-0200-02I

 Thrust piece

*140589006300

 Puller

*124589033300

9

Remove steering coupling (25)

AR46.10-P-8000I

10

Undo bolts (23a) for retaining plate (1g) on front axle carrier (1)

11

Undo bolts (23g) and remove retaining plate (1g)

12

Remove high-pressure expansion hose (30i) and return line (30f)

  Seal line connections with plugs.

 Set of plugs

*129589009100

13

Remove rack-and-pinion steering (23)

 Check rubber mount (21) of rack-and-pinion mounting for signs of damage and replace if necessary: 

Remove rubber mounts (21) on rack-and-pinion steering mounting.

AR46.20-P-0600-02I



Install

14

Clean bolts, nuts and contact surfaces

 The bolts (23a, 23g), nuts and contact surfaces of the retaining plate (1g) and front axle carrier (1) must be free of oil, grease and preservative. Under exposure to heat the lubricants can liquify, allowing bolts and nuts to loosen.

15

Slide locking plate onto steering coupling (25)

 The locking plate is available as a replacement part.

 Insert a new self-locking nut into the existing locking plate.

16

Insert rack-and-pinion steering (23)

17

Turn rack-and-pinion steering (23) to center position

AR46.20-P-0600-01I

18

Install steering joint (25)

 Do not install engine compartment paneling.

AR46.10-P-8000I

19

Attach return line (30f)

 Replace sealing ring.



*BA46.20-P-1001-01E

20

Attach high-pressure expansion hose (30i)

 Replace sealing ring.



*BA46.20-P-1002-01E

21

Mount rack-and-pinion steering (23) and support bracket (1g) onto front axle carrier (1) using bolts (23a, 23g)

 The bolts (23a, 23g), nuts and contact surfaces of the retaining plate (1g) and front axle carrier (1) must be free of oil, grease and preservative. When exposed to heat the lubricants can liquify, allowing bolts and nuts to loosen.

 Rack-and-pinion steering to retaining plate

*BA46.20-P-1003-01E

 Bracket to front axle carrier

*BA46.20-P-1004-01E

22

Attach tie rod joints (10a) to steering knuckles

AR46.40-P-0200-02I



*BA46.40-P-1001-01E

23

 Remove retainer from steering wheel

 Holding device

*129589012100

24

Fill power steering pump and bleed

AR46.30-P-0010N

25

Check steering for function and leaks

 There is a grease cushion under the cover cap. A slight escape of grease is to be regarded as normal and is not to be confused with leakage.

26

Mount front wheels



Remove/install wheels, rotate if necessary

AP40.10-P-4050Z

27.1

Check front axle toe and adjust if necessary

 When installing new parts.

See: 

Perform wheel alignment check

AR40.20-P-0200I

28

Install lower engine compartment paneling

AR61.20-P-1105M

29

Close engine hood

AR88.40-P-1000M

30

Active assisted entry and exit feature

Number

Designation

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/
875/878

BA46.20-P-1001-01E

Return pipe to rack-and-pinion steering

Nm

45

BA46.20-P-1002-01E

High-pressure stretch hose to rack-and-pinion steering

Nm

40

BA46.20-P-1003-01E

Bolted connection, rack-and-pinion steering to retaining plate

Stage 1

Nm

70

Stage 2

°

90

BA46.20-P-1004-01E

Bolted connection, supporting plate to front axle carrier

Stage 1

Nm

110

Stage 2

°

-

Number

Designation

Model 220 except model
220.083/
084/087/
183/184/
187

BA46.40-P-1001-01E

Self-locking nut, tie rod to steering knuckle

Stage 1

Nm

50

Stage 2

°

60