Remove/install rack-and-pinion steering

AR46.20-P-0600I

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

1.1

Deactivate easy entry/exit function

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

 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.

 Deactivation is done using the buttons on the steering wheel in the "comfort" menu of the multifunction display; see operator'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

Extract oil from expansion reservoir of power steering pump

 Hand pump

*210589007100

5

Remove the front wheels



Remove/install wheels

AP40.10-P-4050Z

6.1

Remove bottom engine compartment paneling

Vehicles with gasoline engine

AR61.20-P-1105M

6.2

Remove bottom section of soundproofing

Vehicles with diesel engine

AR94.30-P-5300M

7

Press tie rod joints (10a) off steering knuckles

AR46.40-P-0200-02I

 Thrust piece

*140589006300

 Puller

*124589033300

8.1

Remove bolt (25a) securing steering coupling (25) to lower steering shaft (80a)

Except for models 215.376, 220.074/174

8.2

Remove steering coupling (25)

Model 215.376, 220.074/174

AR46.10-P-8000I

9.1

Insert a suitable tool into hole in steering coupling (25) and pull lower steering shaft (80a) together with locking plate (25f) upward out of steering coupling (25)

Except for models 215.376, 220.074/174

 Do not counterhold at the rubber boot or at the plastic temperature protection disk for the lower steering shaft (80a). Do not use force (hammer blows, excessive leverage) as the lower steering shaft is sensitive to lateral forces.

10

Detach electrical connector (40) from SPS [PML] solenoid valve

11

Remove bolts (23a) securing retaining plate (1g) to front axle carrier (1)

12

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

 Seal off line connections with plugs.

 Plugs

*129589009100

13

Remove bolts (23g) and remove rack-and-pinion steering (23) with retaining plate (1g)



Evaluating steering rack when repairing accident vehicles

AH46.20-P-9409-01A

14

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

Replace if necessary:



Remove rubber mount (21) of rack-and-pinion fixing

AR46.20-P-0600-02I



Install

15

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. Exposure to heat will liquify these substances to such an extent that the threaded connections could loosen.

16

Install rack-and-pinion steering (23) with retaining plate (1g) and attach to front axle carrier (1) using bolts (23a, 23g)

 Rack-and-pinion steering to retaining plate

*BA46.20-P-1003-01E

 Bracket to front axle carrier

*BA46.20-P-1004-01E

17

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

AR46.20-P-0600-01I

18

Slide on locking washer (25f)

 The locking plate (25f) is not available as a replacement part.

 Insert a new self-locking nut into the existing locking plate (25f).

19.1

Insert a suitable tool into hole in lower steering shaft (80a) and insert into steering coupling (25)

Except for models 215.376, 220.074/174

 Do not counterhold at the rubber boot or at the plastic temperature protection disk for the lower steering shaft (80a). Do not use force (hammer blows, excessive leverage) as the lower steering shaft is sensitive to lateral forces.

 Push the lower steering shaft (80a) all the way into the steering coupling (25); when doing so, pay attention to the studs on the steering coupling (25) and the groove in the lower steering shaft (80a) (arrows).

20.1

Screw bolt (25a) into steering coupling (25) and lower steering shaft (80a)

Except for models 215.376, 220.074/174



*BA46.10-P-1001-01E

20.2

Install steering joint (25)

Model 215.376, 220.074/174

AR46.10-P-8000I

21

Attach return line (30f)

 Replace sealing ring.



*BA46.20-P-1001-01E

22

Attach high-pressure expansion hose (30i)

 Replace sealing ring.



*BA46.20-P-1002-01E

23

Connect electrical connector (40) to SPS [PML] solenoid valve

24

Attach tie rod joints (10a) to steering knuckles

AR46.40-P-0200-02I



*BA46.40-P-1001-01E

25

 Remove retainer from steering wheel

 Holding device

*129589012100

26

Fill power steering pump and bleed

Vehicles with AIRmatic (semi-active air suspension), code 489:

model 220 except 220.028/128

AR46.30-P-0010B

Model 220.028/128

AR46.30-P-0010I

Vehicles with Active Body Control (Code 487) only.

AR46.30-P-0010N

27

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.

28

Install front wheels



Remove/install wheels

AP40.10-P-4050Z

29.1

Check front axle toe and adjust if necessary

 When installing new parts.

See: 

Perform wheel alignment check

Model 215, 220 except 220.175/178/875/878

AR40.20-P-0200I

Model 220.175/178

AR40.20-P-0200MB

Model 220.875/878

AR40.20-P-0200MP

30.1

Install lower engine compartment paneling

Vehicles with gasoline engine

AR61.20-P-1105M

30.2

Install bottom sections of soundproofing

Vehicles with diesel engine

AR94.30-P-5300M

31

Close engine hood

AR88.40-P-1000M

32.1

Active assisted entry and exit feature

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

Number

Designation

Model
215

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

BA46.10-P-1001-01E

Bolt, steering coupling to steering shaft

Stage 1

Nm

30

30

Stage 2

°

-

-

Number

Designation

Model
215

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

45

BA46.20-P-1002-01E

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

Nm

40

40

BA46.20-P-1003-01E

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

Stage 1

Nm

70

70

Stage 2

°

90

90

BA46.20-P-1004-01E

Bolted connection, supporting plate to front axle carrier

Stage 1

Nm

110

110

Stage 2

°

-

-

Number

Designation

Model 215

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

50

Stage 2

°

60

60