Remove/install front axle

AR33.10-P-0100TX

Remove/install front axle

7.12.09

19.6.08

Value changed: Union nut, brake line to brake hose

*BA42.10-P-1001-04I

 

Remove/install

 Danger!

Risk of injury caused by body parts being jammed or crushed. Risk of injury to skin and eyes caused by brake fluid spraying out at high pressure when working on the SBC brake system

Deactivate SBC brake system using STAR DIAGNOSIS.

AS42.46-Z-0001-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Notes on AIRmatic

AH32.22-P-1000-02T



Before opening the SBC system, thoroughly clean the surrounding area of the separation point. Even minute particles of dirt, introduced into the hydraulic components, can result in malfunctions and a total failure of the SBC system



When working on the front-end assembly, be careful not to scratch, mark or notch the surfaces of aluminum parts. Otherwise the service life of the parts will be affected

 Installation

Only tighten nuts and bolts of chassis components when vehicle is in a ready-to-drive condition.

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 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.

2

Turn front wheels to straight-ahead position and secure steering wheel with holding device

 On a disengaged steering coupling (9) the steering wheel should not be turned because the spiral contact coil will be destroyed.

 Swivel the sun visor to the side and insert the holding device.



*129589012100

3

Deactivate SBC brake system using STAR DIAGNOSIS.

Vehicles with Sensotronic Brake Control (SBC)

 The following steps should be run through in STAR DIAGNOSIS:

Select the menu item "SBC-Sensotronic Brake Control"/"Initial startup after repair"/"Deactivate 'SBC' system".

Then process all the individual steps from top to bottom.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-P-2000-04A

4

Empty front suspension struts (7) using STAR DIAGNOSIS

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

5

Remove air filter housing with air ducts

Model 219.377

AR09.10-P-1150TMG

Model 219.354 /356 /357 /372

AR09.10-P-1150TS

Model 219.375

AR09.10-P-1150TY

Model 219.376

AR09.10-P-1150TZ

Model 219.322

AR09.10-P-1150TQ

6

Suction off oil from power steering expansion reservoir using hand pump



*210589007100

7

Mount engine support frame and raise engine

AR33.10-P-0100-01TX



*240589006100

8

Remove the front wheels



Remove/install wheels

AP40.10-P-4050TX

9

Installing protective washers to protect brake disk dust shields

AR42.00-P-0100-01TX



*220589013100

10

Remove left front rpm sensor (L6/1) and right front rpm sensor (L6/2) from steering knuckles (5) and hang to one side

Vehicles without AIRmatic

 To do so undo bolt (6a) and unclip electrical feed lines of left front rpm sensor (L6/1) and right front rpm sensor (L6/2) from retaining clamps.

 Installation: Observe correct observe installation position, the chafe protection (5a) must be screwed to the rpm sensor (L6/1, L6/2) as shown. It must not be assembled between the rpm sensor (L6/1, L6/2) and steering knuckle (5).



*BA42.30-P-1001-01H

11

Disconnect left front brake pad contact sensor (S10/1) and right front brake pad contact sensor (S10/2) at connectors.

Vehicles without AIRmatic

12

Detach electrical feed lines (10a) of left front brake pad contact sensor (S10/1) and right front brake pad contact sensor (S10/2) from brake calipers

Vehicles without AIRmatic



*BA42.10-P-1003-10B

 Danger!

Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.

Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A

13

Unscrew brake lines (52) from brake hoses (51) and seal openings

 Seal off line connections immediately with plugs. The brake fluid expansion reservoir must not be allowed to run completely empty.

 When loosening and tightening the brake line (52) on the brake hose (51), take care not to twist the bracket (51a). Counterhold open wrench on two flats of brake hose (51) using an open-end wrench.

 Installation: The brake hose (51) must not be twisted after tightening (risk of cracking).



*BA42.10-P-1001-04I



*000589750300



*129589009100



Brake fluid notes

AH42.50-P-0001-01A



Notes on installing brake hoses

AH42.10-P-9406-01A

14

Remove front suspension struts (7).

Vehicles without AIRmatic

AR32.25-P-1017TX

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

AR32.25-P-1017TY

15

Detach electrical connectors of left front brake pad contact sensor (S10/1), right front brake pad contact sensor (S10/2), left front rpm sensor (L6/1) and right front rpm sensor (L6/2)

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

AR42.10-P-1040-04TX

16

Detach upper transverse control arm (8) from front end

AR33.20-P-0500TX

17.1

Remove bottom engine compartment paneling

Vehicles with gasoline engine

AR61.20-P-1105TX

 Installation: Only install the engine compartment paneling after the leak check on the rack-and-pinion steering (10).

17.2

Remove bottom section of soundproofing

Vehicles with diesel engine

AR94.30-P-5300TX

 Installation: Do not install bottom section of soundproofing until after rack-and-pinion steering (10) has been checked for leaks.

18

Pull steering coupling (9) off rack-and-pinion steering (10).

AR46.10-P-8000TX

19

Detach left and right front engine mount (11) from front axle carrier (1).

 Vehicles with gasoline engine

*BA22.10-P-1001-01S

 Vehicles with diesel engines

*BA22.10-P-1001-01D

20

Separate electrical connector from SPS [PML] solenoid valve (Y10)

21

Remove cable tie (arrow) and place electric feed line of SPS [PML] solenoid valve (Y10) to the side

22

Detach retaining plate (12) and bolt (13) from rack-and-pinion steering (10) and pull oil lines (30i, 30f) out of rack-and-pinion steering (10) and put down to one side

See Remove/install rack-and-pinion steering (10).

AR46.20-P-0600TX

 Before opening the hydraulic circuit of the rack-and-pinion steering (10) the area around the separation point should be cleaned thoroughly. Even minute particles of dirt, introduced into the hydraulic components, can result in malfunctions of the rack-and-pinion steering (10).

 Collect escaping hydraulic fluid in a container and seal line connections with stop plugs.

 Installation: Replace O-rings.



*129589009100

23

Detach bracket of power steering return line from the front axle carrier (1)

24

Prop front axle carrier (1) with transmission jack and transmission plate

AR33.10-P-0100-03TX

25

Remove bolts (1a, 1b)



*BA33.10-P-1002-01J

26

Lower front axle carrier (1)

27

Check front axle for damage and replace damaged parts

28

Install in the reverse order

29

Fill power steering pump and bleed

Model 219.354 /356 /357 /372 /322

AR46.30-P-0010TX

Model 219.375 /376/ 377

AR46.30-P-0010TY

30

Check steering for function and leaks

31.1

Bleed brake system with STAR DIAGNOSIS

Vehicles with Sensotronic Brake Control (SBC)

AR42.10-P-0012TX

 The following steps should be run through in STAR DIAGNOSIS:

Select menu item "initial startup after repair"/"after opening or replacing one or several brake hoses".

Then process all the individual steps from top to bottom.

 When performing the bleeding operation always observe the instructions in the document "Bleeding brake system using STAR DIAGNOSIS".



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-P-2000-04A

31.2

Bleed brake system

Vehicles with Adaptive Brake (ABR)

AR42.10-P-0010T

32

Perform a wheel alignment check

AR40.20-P-0200TX

Number

Designation

Engine
113 in model 219

Engine
156.983
in model 219

BA22.10-P-1001-01S

Bolt, front engine mount to front axle carrier

Nm

35

35

Number

Designation

Engine
642 in model 219

BA22.10-P-1001-01D

Bolt, front engine mount to front axle carrier

Nm

35

Number

Designation

Engine
272, 273
in model 219

BA22.10-P-1001-01S

Bolt, front engine mount to front axle carrier

Nm

35

Number

Designation

Model
219.3

BA33.10-P-1002-01J

Bolt, front axle carrier to longitudinal member

Nm

100

Number

Designation

Model
219.372/376/377

Model
219.322/354/356/
357/375

BA42.10-P-1003-10B

Bolt, brake pad contact sensor to brake caliper

Nm

8

8

Number

Designation

Model
219
with SBC

Model
219 with
ABR

BA42.10-P-1001-04I

Union nut, brake line to brake hose

Nm

18

18

Number

Designation

Model
219

BA42.30-P-1001-01H

Self-locking bolt, front axle rpm sensor to steering knuckle

Nm

25