Remove/install rack-and-pinion steering

AR46.20-P-0600TX

Remove/install rack-and-pinion steering

17.10.11

14.6.10

Value changed: Self-locking nut for tie rod to steering knuckle, 2nd stage

*BA46.40-P-1001-01E

 

Remove/install

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

AS00.00-Z-0013-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

1

Extend or pull out adjustable steering column fully

 Needed for separating the steering coupling (5).

2

Deactivating entry/exit aid

Vehicles with memory package (driver seat, steering column, mirrors) code 275

 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.

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

3

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

 On a disengaged steering coupling (5) the steering wheel should not be turned because the spiral contact coil will be destroyed.



*129589012100

4

Remove front engine cover

Engine 156

5

Extract oil from power steering reservoir



*210589007100

6

Remove the front wheels



Remove/install wheels, rotate if necessary

AP40.10-P-4050TX

7.1

Remove bottom engine compartment paneling

Vehicles with gasoline engine

AR61.20-P-1105TX

7.2

Remove bottom sections of soundproofing

Vehicles with diesel engine

AR94.30-P-5300TX

8

Press tie rod joints (1) off steering knuckles

AR46.40-P-0200-02TX



*BA46.40-P-1001-01E



*140589006300



*124589033300

9

Detach heat shield (2) from front axle carrier (3)

10

Detach steering coupling (5) from lower steering shaft (6); to do so, remove bolt (4)

 The locking plate (7) is available as a replacement part.

 Installation: Insert a new self-locking nut into the existing locking plate (7). Push on locking plate (7) until the lug on the locking plate (7) engages in the steering coupling.



*BA46.10-P-1001-01E

11

Pull the lower steering shaft (6) upward to extract it from the steering coupling (5)

 Do not use force (hammer, strong lever action) since the lower steering shaft is sensitive to lateral impacts. This would cause distortion and render the lower steering shaft unusable.

 Installation: Turn rack-and-pinion steering (10) to center position and fit steering coupling.

AR46.20-P-0600-01TX

 Installation: Watch the tab on the steering coupling and the groove in the lower steering shaft while sliding the lower steering shaft all the way into the steering coupling.

12

Cut cable tie (arrow) and disconnect plug from SPS solenoid valve (Y10)

13

Dismantle bracket (8) from rack-and-pinion steering (10)

14

Detach oil line retaining plate (9) from rack-and-pinion steering (10) and pull out oil lines.

 Before opening the hydraulic system, thoroughly clean the area around the separation point since even minute particles of dirt, introduced into the hydraulic components, can result in malfunctions and a total failure of the hydraulic system.

 Installation: Replace O-rings.

 Seal off line connections with plugs.



*BA46.20-P-1001-01J



*129589009100

15

Support rack-and-pinion-steering (10) using transmission jack and platform

Telescopic lifter
gotis://H_00.10_01.0

Transmission plate for passenger cars and commercial vehicles
gotis://A_25/35/49_02.0

16

Detach rack-and-pinion steering (10) from front axle carrier (3) by unscrewing bolts (10a, 10b)

 Installation: Bolts, nuts and bolted connection area must be free of oil and grease since lubricants can melt and spread as result of a rise in temperature and this may cause the bolted connections to work loose.



*BA46.20-P-1002-01J

17

Carefully lower rack-and-pinion steering (10).



Evaluating steering rack when repairing accident vehicles

AH46.20-P-9409-01A



Checking

18

Check rubber mount (11) of rack-and-pinion steering mounting for damage.

Replace if necessary:



Remove rubber mount of rack-and-pinion steering fastening

AR46.20-P-0600-02TX

19

Install in the reverse order

20

Fill power steering pump and bleed

Engine 272, 273, 642

AR46.30-P-0010TX

Engine 113, 156

AR46.30-P-0010TY

21

Check steering for function and leaks

22

Check front axle toe and adjust if necessary

 When installing new parts.

See: 

Perform wheel alignment check

AR40.20-P-0200TX

Number

Designation

Model
219

BA46.40-P-1001-01E

Self-locking nut, tie rod to steering knuckle

Stage 1

Nm

50

Stage 2

°

90

Number

Designation

Model
219

BA46.10-P-1001-01E

Bolt, steering coupling to steering shaft

Stage 1

Nm

30

Stage 2

°

-

Number

Designation

Model
219

BA46.20-P-1001-01J

Bolt, oil line retaining plate to rack-and-pinion steering

Nm

18

BA46.20-P-1002-01J

Bolted connection, rack-and-pinion steering to front axle carrier

Stage 1

Nm

70

Stage 2

°

90