Remove/install front axle

AR33.10-P-0100FRX

Remove/install front axle

01.07.2019

Model

290 with engine 256

Shown except code 489 (AIR BODY CONTROL)

4

Front axle

10

Screw

6

Radiator seat

11

Elastomer bearing

7

Aluminum strut

15

Bolts

9

Screw

Shown with code M005 (4MATIC)

1

Cooler package

12

Diagonal strut

4

Front axle

13

Electrical connectors

6

Radiator supports

14

Rack-and-pinion steering

7

Aluminum strut

1

Cooler package

5

Condenser

2

Tensioning strap

6

Radiator seat

3

Refrigerant line

7

Aluminum strut

4

Front axle

8

Air duct segments

4

Front axle

24

Lifting platform

25

Tensioning strap

23

Tensioning strap

 Danger

Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0007-01A

 Warning

Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0006-01A

 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

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Topical note

Notes on installation position of condenser

AH83.30-P-0002-01LW

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A

 

Remove/install

1

Secure vehicle on vehicle lift.

AR00.60-P-0100-01A

 Vehicle hoist securing tool

*171589013100

2

Drain pressure in AIR BODY CONTROL system using vehicle diagnosis system.

Model 290 with engine 256
with code 489 (AIR BODY CONTROL)



AD00.00-P-2000-06FR

3

Deactivate easy entry and exit feature.

Model 290 with engine 256
with code 275 (Memory package)

4

Turn rack-and-pinion steering (14) to center position and fix steering wheel in place with holding device.

AR46.20-P-0500-01FR

 Retainer device

*129589012100

5

Discharge air conditioning system.

AR83.30-P-1760FR

6

Mount engine support fixture

Model 290 with engine 256.9

Topical note

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

AH00.00-P-0020-01A

AR01.10-P-2400-18MSA

 Screw/bolt, upper struts to suspension strut tower mounting bracket

*BA62.30-P-1001-02K

 Adapter set

*715589226300

 Adaptation of engine lifting device

*642589006100

 Adapter

*257589003100

 Adapter kit

*240589013100

 Mount

*240589006110

 Engine lifting device

*240589006100

 Adaptation plates

*240589003200

 Engine hoist

*205589006100

7

Remove engine compartment lining at front, center and rear.

AR61.20-P-1105FRX

8

Secure radiator package (1) against falling down using a tensioning strap (2).


Do not tighten tensioning strap (2) too far.
Otherwise the components can be damaged.

9

Remove refrigerant line (3) at condenser (5), hang to one side and seal connections.



Compressor oils (specification 362.1)

BB00.40-P-0362-01A

 Installation: Replace sealing rings and moisten with compressor oil.

 Nut/bolt, refrigerant line to condenser

*BA83.30-P-1005-01S

 Assembly tool

*000589936300

 Record plug

*129589009100

10

Remove front axle shafts and fix right and left steering knuckle in place on strut rod using tensioning strap.

Model 290 with engine 256
with code M005 (4MATIC)

AR33.30-P-0620MNI


The steering knuckles must NOT fold outward after they are detached from the upper transverse control arms.
Otherwise ball joints may be damaged.

11

Disconnect electrical connector and remove right front brakepad wear sensor and hang to one side.

 Bolt, brake wear sensor to brake caliper

*BA42.10-P-1002-10BA

12

Remove brake calipers with brakepads and attach to the vehicle with the brake hose attached and free of tension.

Model 290 with engine 256
with code B06 (grey-painted brake callipers)
except code B07 (Ceramic brake system)
Model 290 with engine 256
with code U69 (Yellow-painted AMG brake callipers)
except code B07 (Ceramic brake system)
Model 290 with engine 256
with code U70 (red-painted brake callipers)
except code B07 (Ceramic brake system)

AR42.10-P-0070FRX

Model 290 with engine 256
with code B07 (Ceramic brake system)

AR42.10-P-0070FRK

13

Remove suspension struts from spring links.

Model 290 with engine 256
with code 489 (AIR BODY CONTROL)

AR32.25-P-1017FRA

Model 290 with engine 256
except code 489 (AIR BODY CONTROL)

AR32.25-P-1017FR

14

Unhook electrical wiring harnesses from holders on spring links and axle carrier and place to one side.

15

Remove line brackets of front axle rpm sensors from front axle carrier and hang to one side with connected electric lines.

AR42.30-P-0713FRX

 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

16

Disconnect steering coupling.

AR46.10-P-8000-01FR

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

 Engine mount wrench set

*001589011600

17

Disconnect electrical connectors (13).

18

Remove left and right diagonal strut (12).

Model 290 with engine 256
with code M005 (4MATIC)

AR61.10-P-5141FRX

19

Remove screws of engine mounts from front axle (4).

Model 290 with engine 256.9

AR22.10-P-4330MSA

20

Remove coolant circulation pump with bracket from right radiator mount and hang to one side with connected lines.

21

Lift engine using engine support fixture until the guide pins of the engine mount fully extend out of the axle carrier.



000 588 03 62 00 Lifting platform

WS01.00-P-0091A

22

Position lifting platform (24) on front axle (4) and secure with tensioning strap (23).



000 588 03 62 00 Lifting platform

WS01.00-P-0091A

23

Remove holders of engine compartment lining from aluminum struts (7).

24

Unscrew screws/bolts (9).

25

Remove screws (10) of front axle (4).

Topical note

Notes on bolted connections with self tapping screws

AH00.00-P-0007-01SF

 Bolt, front axle carrier to longitudinal member

*BA33.10-P-1001-01Q

26

Lower front axle (4) slightly.


Note radiator package (1) when lowering.
Otherwise it may be damaged.

27

Push spring links downward and position suspension struts in front of spring links.


Carefully position the suspension struts in front of the spring control arms.
Otherwise the suspension strut joints can be damaged.

28

Mark aluminum struts (7) relative to front axle (4) using colored pencil.

29

Remove screws (15) and remove left and right radiator mount (6).

 Installation: Make sure that the elastomer bearings (11) are seated correctly.

 Bolt, strut (impact absorber) to front axle carrier

*BA33.10-P-1003-01Q

30

Pull front axle (4) slightly toward rear and remove aluminum struts (7).

 Installation: Note the previously made markings when sliding in the aluminum struts (7).

31

Fully lower front axle (4).


Carefully lower front axle (4).
Otherwise adjacent components may be damaged.

32

Install in the reverse order



Measure

33

Perform chassis alignment.

AR40.20-P-0200FRX

 Front axle carrier

Number

Designation

Model 290

BA33.10-P-1001-01Q

Bolt, front axle carrier to longitudinal member

Nm

180

 Front axle carrier

Number

Designation

Model 290

BA33.10-P-1003-01Q

Bolt, strut (impact absorber) to front axle carrier

Nm

23

 Front axle brake caliper

Number

Designation

Model 290

BA42.10-P-1002-10BA

Bolt, brake wear sensor to brake caliper

Nm

8

 Frond end with front reinforcement

Number

Designation

Model 290

BA62.30-P-1001-02K

Screw/bolt, upper struts to suspension strut tower mounting bracket

Stage 1

Nm

35

Stage 2

Nm

50

Stage 3

Loosen

°

180

Stage 4

Nm

50

 Air conditioning

Number

Designation

Model 290

BA83.30-P-1005-01S

Nut/bolt, refrigerant line to condenser

Nm

12