Remove/install rack-and-pinion steering

AR46.20-P-0600R

Remove/install rack-and-pinion steering

11.3.10

28.2.07

Self-locking nut, steering joint to rack-and-pinion steering

*BA46.10-P-1002-01E



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 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

1

Open engine hood

AR88.40-P-1000R

2.1

Extract oil from expansion reservoir of power steering pump

Vehicles without active body control (ABC)

 Hand pump

*210589007100

2.2

Suction off oil from the tandem pump expansion reservoirs

Vehicles with Active Body Control (Code 487) only.

 Hand pump

*210589007100

3

Deactivate easy entry/exit function for driver seat and steering wheel

 Otherwise the driver seat and steering wheel move to a different position, e.g. when the driver door is opened/closed. The upper frame may be damaged when the holding device is installed.

 It is switched off using the buttons on the steering wheel in the "Comfort" menu on the multifunction display, see vehicle owner's manual.

4

Turn steering wheel to central position (front wheels in straight ahead position) and secure with the retaining 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

5

Remove the front wheels



Remove/install wheels, rotate if necessary

AP40.10-P-4050Z

6

Remove center and rear sections of lower engine compartment paneling

AR61.20-P-1105R

7

Press tie rod joints (10a) off steering knuckles

AR46.40-P-0200-02I

 Thrust piece

*140589006300

 Puller

*124589033300

8

Unclip cap (2)

9

Remove bolts (3) from front diagonal struts

10

Disconnect plug (26) from SPS solenoid valve (Y10)

11

Unscrew nut (25k)

12

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

13

Remove bolts (23g) of retaining plate (1g) on front axle carrier (1)

14

Remove bolt (23k) for hydraulic line bracket (30i)

15

Remove bolt (30I) of the hydraulic line (30i) and hydraulic line (30k) on the rack-and-pinion steering (23)

 Detach hydraulic lines (30i, 30k), seal line terminals with stop plugs.

 Set of stop plugs

*129589009100

16

Pull out bolt (25b)

17

Move out rack-and-pinion steering (23) towards the front



Evaluating steering rack when repairing accident vehicles

AH46.20-P-9409-01A

18

Check rubber mount (21) on rack-and-pinion steering mounting for damage

 Replace if required, see: 

Remove rubber mount of rack-and-pinion mounting.

AR46.20-P-0600-02I

Lubricant paste

*BR00.45-Z-1002-06A

19

Check protective cap on input shaft of rack-and-pinion steering (23) for damage

 Replace if required, see: 

Remove/install protective cap for input shaft on steering gear.

AR46.20-P-0004P



Install

20

Insert rack-and-pinion steering (23) into steering coupling (25) using installation aid (23h)

 Do not remove installation aid (23h).

21

Mount steering coupling (25) using bolt (25b) and nut (25k) to rack-and-pinion steering (23)



*BA46.10-P-1002-01E

22

Fasten rack-and-pinion steering (23) to the front axle carrier (1) using bolts (23a) and bolts (23g)

 Bolts (23a), bolts (23g), nuts and the area around the bolts must be free of oil and grease. Under exposure to heat the lubricants can liquify, allowing bolts and nuts to loosen.



*BA46.20-P-1003-01E



*BA46.20-P-1004-01E

23

Screw in bolt (30I) for hydraulic line (30i) and hydraulic line (30k) to rack-and-pinion steering (23)

 Install new sealing rings.



*BA46.20-P-1006-01E

24

Fix bracket for hydraulic line (30i) with bolt (23k)

25

Connect plug (26) to SPS solenoid valve (Y10)

26

Attach tie rod joints (10a) to steering knuckles

AR46.40-P-0200-02I



*BA46.40-P-1001-01E

27

Screw in bolts (3) for front diagonal struts

 Only tighten the bolts (3) for the diagonal struts once the vehicle is standing with its wheels on the ground.



*BA61.10-P-1011-01C

28

Clip on cap (2)

29

Fill power steering pump and bleed

Vehicles with Active Body Control (Code 487) only.

AR46.30-P-0010N

Vehicles without active body control (ABC)

AR46.30-P-0010B

30

Check steering for function and leaks

31

Mount front wheels



Remove/install wheels, rotate if necessary

AP40.10-P-4050Z

32

Check front axle toe and adjust if necessary

 When installing new parts.

see: 

Perform a wheel alignment check

AR40.20-P-0200R

33

Install lower engine compartment paneling

AR61.20-P-1105R

34

Close engine hood

AR88.40-P-1000R

Number

Designation

Model
230

BA46.10-P-1002-01E

Locking screw and steering coupling locknut to rack-and-pinion steering

Nm

24

Number

Designation

Model
230

BA46.40-P-1001-01E

Self-locking nut, tie rod to steering knuckle

Stage 1

Nm

50

Stage 2

°

60

Number

Designation

Model
230

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

°

-

BA46.20-P-1006-01E

Bolt on clamp plate, high-pressure line / return line to rack-and-pinion steering

Nm

18

Number

Designation

Model
230

BA61.10-P-1011-01C

Self-locking bolt, front diagonal strut to frame floor assembly/front axle carrier

Nm

70

Number

Designation

Order number

BR00.45-Z-1002-06A

Lubricating paste, rubber parts 2.5 kg, DB supply specification 6867.00

A 000 989 01 60