Remove/install rack-and-pinion steering

AR46.20-P-0600FR

Remove/install rack-and-pinion steering

21.12.2017

Model

257

Shown except CODE M005 (4MATIC)

1

Electrical connectors

5

Screw

2

Bracket for steering electrical wiring harness

6

Screw

3

Rack-and-pinion steering

7

Mounting plate

4

Bolts

Shown with code M005 (4MATIC)

1

Electrical connectors

6

Screw

3

Rack-and-pinion steering

7

Mounting plate

4

Bolts

8

Cover

5

Screw

 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

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

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

AH00.00-P-0020-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

 

Remove/install

1

Deactivate easy entry/exit feature

Model 257
with code 275 (Memory package)

2

Move steering wheel forward and upward

3

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


The steering wheel must not be turned when the steering coupling is removed.
Otherwise the clock spring contact will be destroyed.

 Retainer device

*129589012100

4

Remove front wheels

AR40.10-P-1102A

5

Remove rear and center section of lower engine compartment paneling

AR61.20-P-1105FR

6

Detach tie rods from steering knuckles

AR46.40-P-0200FR

 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

7

Disconnect steering coupling from steering shaft

Separate and connect steering coupling

AR46.10-P-8000-01FR

Move rack-and-pinion steering (3) to center position

AR46.20-P-0500-01FR

 Installation: Before connecting the steering coupling, it must be ensured that the rack-and-pinion steering (3) is in the center position.

 Engine mount wrench set

*001589011600

8

Separate electrical connections (1)

9.1

Remove bracket for steering electrical wiring harness (2) on left mounting plate (7) and on front axle carrier and place to one side

Model 257
except code M005 (4MATIC)

9.2

Open cover (8) at connecting point and fold to one side

Model 257
with code M005 (4MATIC)

10

Support rack-and-pinion steering (3) and secure to prevent it from falling down

11

Unscrew bolts (4, 5, 6) and remove rack-and-pinion steering (3)

 Installation: Replace the bolts (4, 5, 6) and mounting plates (7).
Fit the bolts (4, 5, 6) first, and then tighten in the following sequence: Bolts (4), bolts (5), bolts (6).

 Bolt, electric rack-and-pinion steering to front axle carrier

*BA46.20-P-1001-01Q

 Screw/bolt, rack-and-pinion steering mounting plate to front axle carrier

*BA46.20-P-1002-01Q

12

Remove retaining clip for bracket for steering electrical wiring harness (2)

Model 257
except code M005 (4MATIC)
When replacing the rack-and-pinion steering (3).

13

Detach steering coupling from rack-and-pinion steering (3)

When replacing the rack-and-pinion steering (3).

AR46.10-P-8000FR



Check

14

Check rack-and-pinion steering (3)

After repairing an accident vehicle.

Evaluating steering gear when repairing accident vehicles

AH46.20-P-9409-01A

If a problem arises



Replace rack-and-pinion steering (3).

15

Install in the reverse order

16

Enter new steering gear number of rack-and-pinion steering (3) in on-line vehicle data card using Vehicle Documentation system (VeDoc)

When replacing the rack-and-pinion steering (3).

 Redocumentation is absolutely essential.

17

Perform wheel alignment check

AR40.20-P-0200FR

 Steering gear

Number

Designation

Model 205, 213, 238, 257
except code M005 (4MATIC)

Model 205, 213, 238, 257
with code M005 (4MATIC)

BA46.20-P-1001-01Q

Bolt, electric rack-and-pinion steering to front axle carrier

M8/M10

Stage 1

Nm

20

20

Stage 2

°

90

90

M12

Stage 1

Nm

100

100

Stage 2

°

90

90

 Steering gear

Number

Designation

Model 205, 213, 238, 257
except code M005 (4MATIC)

Model 205, 213, 238, 257
with code M005 (4MATIC)

BA46.20-P-1002-01Q

Screw/bolt, rack-and-pinion steering mounting plate to front axle carrier

M10

Nm

50

50