Remove/install front axle gear

AR33.30-P-0525LF

Remove/install front axle gear

05.05.2020

Model

217, 222 with transmission 725.0

with code M005 (Vehicles with 4MATIC/all-wheel drive)

1

Front axle transmission

3a

Screw

3b

Screw

3c

Screw

4

Support brace

1

Front axle transmission

2

Screw

3c

Screw

1

Front axle transmission

5l

Radial shaft sealing ring

5r

Radial shaft sealing ring

 Caution

Risk of injury to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil

Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.

AS00.40-Z-0001-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

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

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Remove

1

Remove propeller shaft from front axle differential (1).

Model 217, 222 with engine 176, 278 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)
Model 217, 222 with engine 177 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)
Model 222 with engine 276, 642, 656 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR41.10-P-0070LFX

Model 222 with engine 256 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR41.10-P-0070MRT

2

Remove drain screw and drain hypoid gear oil from front axle differential (1) and collect with a suitable container.

3

Remove rack-and-pinion steering.

AR46.20-P-0600LF

4

Remove right front axle shaft.

AR33.30-P-0620LFX

5

Remove intermediate shaft.

AR33.30-P-0625LFX

6

Remove starter-alternator control unit(N129).

Model 222 with engine 256.9 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR15.40-P-0004MRT

7

Release and disconnect electrical connector of the oil sensor (oil level, temperature, and quality) (B40).

Model 217, 222 with engine 177 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR18.40-P-5116MNM

8

Remove screws (2, 3a, 3b, 3c) and place front axle differential (1) onto front axle.

9

Remove support (4).

10

Remove front axle differential (1) downwards.

11

Check that pilot bushing in oil pan is correctly seated.

In the case of a complaint,



Replace pilot bushing.

12

Remove  radial shaft sealing rings (5l, 5r).


Do not damage seat of radial shaft sealing rings (5l, 5r).
Otherwise, the front axle differential (1) will be leaky.

  Connect the internal extractor and  impact extractor to the threaded rod of the  extraction tool.

 Internal extractor

*203589033300

 Extraction tool

*221589043300

 Impact extractor

*602589003300

13

Check seat of radial shaft sealing rings (5l, 5r) for damage and galling.

In the case of a complaint,



Replace front axle differential (1).



Install

14

Coat sealing lips of new radial shaft sealing rings (5l, 5r) with transmission oil.



Universal hypoid gear oils (specification 235.7)

BB00.40-P-0235-07A

15

Install new radial shaft sealing rings (5l, 5r) with drift.

 Drift

*221589041500

16

Position front axle differential (1) on front axle.

17

Install support (4).

 Collar bolt, support to oil pan

*BA33.30-P-1011-03G

18

Attach front axle differential (1) to support (4).

AR33.30-P-0525-06AVG

 Collar bolt, front axle differential to support/oil pan

*BA33.30-P-1006-03G

 Collar bolt, front axle gear to engine support

*BA33.30-P-1007-03G

19

Screw drain screw into front axle differential (1).

 Replace seal.

 Front axle transmission drain screw

*BA33.30-P-1008-03G

20

Fill front axle differential (1) with hypoid gear oil.

 The front axle transmission (1) does not have an oil filler hole and must be filled through the front axle shaft opening.

 Hypoid gear oil

*BF33.30-P-1001-03F

 Hand pump

*210589007100

21

Assemble and lock electrical connector of oil sensor (oil level, temperature and quality) (B40).

Model 217, 222 with engine 177 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR18.40-P-5116MNM

22

Install starter-alternator control unit (N129).

Model 222 with engine 256.9 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR15.40-P-0004MRT

23

Install intermediate shaft.

AR33.30-P-0625LFX

24

Install right front axle shaft.

AR33.30-P-0620LFX

25

Install rack-and-pinion steering.

AR46.20-P-0600LF

26

Install propeller shaft onto front axle differential (1).

Model 217, 222 with engine 176, 278 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)
Model 217, 222 with engine 177 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)
Model 222 with engine 276, 642, 656 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR41.10-P-0070LFX

Model 222 with engine 256 with transmission 725.0
with code M005 (Vehicles with 4MATIC/all-wheel drive)

AR41.10-P-0070MRT

 Only install center and rear lower rear engine compartment paneling again after leak test.

27

Check front axle differential (1) for proper operation and leak tightness.

28

Install center and rear lower engine compartment lining.

AR61.20-P-1105LF

 Front axle differential

Number

Designation

Model 217

Model 222

BA33.30-P-1006-03G

Collar bolt, front axle differential to support/oil pan

Nm

65

65

 Front axle differential

Number

Designation

Model 217

Model 222

BA33.30-P-1007-03G

Collar bolt, front axle gear to engine support

Stage 1

Nm

5

5

Stage 2

Nm

50

50

Stage 3

°

95

95

 Front axle differential

Number

Designation

Model 217

Model 222

BA33.30-P-1008-03G

Front axle transmission drain screw

Nm

20

20

 Front axle differential

Number

Designation

Model 217

Model 222

BA33.30-P-1011-03G

Collar bolt, support to oil pan

Nm

60

60

 Front axle gear

Number

Designation

Model 217

Model 222

BF33.30-P-1001-03F

Hypoid gear oil

Filling capacity

Liter

0,55

0,55

Universal hypoid gear oil

BB00.40-P-0235-07A

BB00.40-P-0235-07A

Overview of axle gear oils

BB00.40-P-0231-01A

BB00.40-P-0231-01A

Axle gear oils

BB00.40-P-0239-72A

BB00.40-P-0239-72A