Remove/install front axle gear - AR33.30-P-0525SYZ

MODEL 221, 216 with 4MATIC

Fig 1: Identifying Front Axle Gear Remove/Install Components

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

6.5.08

"Observe tightening sequence when installing front axle transmission" added

	Removing
	Absolute cleanliness is essential when working on the front axle transmission (1). Even minute dirt particles can prevent the front axle transmission (1) from functioning correctly
1	Detach propeller shaft from front axle transmission (1)		AR41.10-P-0070SYZ
2	Remove front axle carrier		AR33.10-P-0001SYZ
3	Remove intermediate shaft		AR33.30-P-0625SYZ
4	Remove bolts (1r, 1s) and remove front axle differential (1)	The guide sleeve of the intermediate shaft may become detached from the oil pan when the front axle transmission is removed.
	Install
5	Check that guide sleeve is seated correctly in oil pan
6	Attach front axle transmission (1) to front axle	It is essential to observe the tightening sequence. Failure to do so will result in noises and vibrations in the front axle transmission.	AR33.30-P-0525-04CWX
			*BA33.30-P-1006-03G
			*BA33.30-P-1007-03G
7	Remove drain screw (2s) and drain oil from front axle transmission (1)		*BA33.30-P-1008-03G
8	Fill front axle transmission (1) with oil	The front axle transmission does not have an oil filler hole and must be filled via the front axle shaft opening.
8	Fill front axle transmission (1) with oil		*BF33.30-P-1001-03C
	Universal hypoid gear oils (SAE 85 W-90)	Specification 235.7	Universal hypoid gear oils (specification 235.7). MB 235.7/235.74 FE hypoid gear oil A 001 989 33 03/Mobilube FE/FE Plus 75W-85
9	Install intermediate shaft		AR33.30-P-0625SYZ
10	Install front axle carrier		AR33.10-P-0001SYZ
11	Attach propeller shaft to front axle transmission (1)	It is essential to observe the tightening torque. Failure to do so will result in noises and vibrations in the front axle transmission.	AR41.10-P-0070SYZ
	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
12	Perform engine test run and check front axle transmission (1) for leaks and that it is functioning correctly

FRONT AXLE TRANSMISSION

Number	Designation			Model 216	Model 221
BA33.30-P-1006-03G	Collar bolt, front axle gear to support brace		Nm	65	65
BA33.30-P-1007-03G	Collar bolt, front axle transmission to engine support	Stage 1	Nm	5	5
		Stage 2	Nm	50	50
		Stage 3	∠°	95	95
BA33.30-P-1008-03G	Oil drain screw, front axle gear		Nm	20	20

FRONT AXLE GEAR

Number	Designation			Model 216 with 4MATIC	Model 221 with 4MATIC
BF33.30-P-1001-03C	Hypoid gear oil	Filling capacity	Liters	0.6	0.6
BF33.30-P-1001-03C	Hypoid gear oil	Specifications for service products	Specification	Universal hypoid gear oils (specification 235.7). MB 235.7/235.74 FE hypoid gear oil A 001 989 33 03/Mobilube FE/FE Plus 75W-85	Universal hypoid gear oils (specification 235.7). MB 235.7/235.74 FE hypoid gear oil A 001 989 33 03/Mobilube FE/FE Plus 75W-85