Replacing steering shaft boot - AR46.10-P-0621VA

MODEL 171.454 /456 /473 

Fig 1: Identifying Steering Shaft Boot Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on self-locking nuts and bolts		-
1	Extend or pull out adjustable steering column fully
2.1	Deactivate easy entry/exit	Vehicles with memory package (driver seat, steering column, mirrors) code 275 If the vehicle is equipped with the easy entry and exit feature, this will have to be deactivated first The driver seat and steering wheel move to a different position, when the driver door is opened/closed, see operating instructions. The upper frame will be damaged if the retaining device is installed	AR54.30-P-1000-02EDV
3	Turn steering wheel to center position (front wheels in straight-ahead position) and fix in place with holding device	On a disengaged steering coupling (25) the steering wheel should not be turned because the spiral contact coil will be destroyed.
		Retainer	Fig 2
4	Open engine hood		AR88.40-P-1000V
5	Unclip the cable of the O2 sensor from the cable bracket (1) and unscrew bolt (2a)
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	-
6	Raise vehicle with lifting platform		AR00.60-P-1000V
7	Remove engine compartment paneling		AR61.20-P-1105V
8	Unscrew bolts (2b) and remove heat shield (2) downwards
9	Detach steering coupling (25) from the lower steering shaft (80a); to do this, unscrew bolt (25a)		*BA46.10-P-1001-01E
10	Pull the lower steering shaft (80a) upward to extract it from the steering coupling (25).	Do not use force (hammer blows, excessive leverage) because the lower steering shaft is sensitive to lateral forces and can be damaged as a result. Installation:  Insert lower steering shaft (80a) fully into the steering coupling (25); pay attention to the studs of the steering coupling (25) and groove of the lower steering shaft (arrows).
11	Pull locking plate (25f) off the steering coupling (25) while lifting the lug using a suitable tool	Installation:  Replace locking plate (25f) with self-locking nut. Push on the locking plate (25f) until the lug in the steering coupling (25) latches.
12	Pull boot (3) out of the firewall and remove from lower steering shaft	Installation:  Grease boot (3) on the jacket tube in the area of the sealing surface and insert. Ensure that the continuous groove guarantees correct sealing.
		Klueber Polylub GLY 801 grease	*BR00.45-Z-1046-06A
13	Install in the reverse order

STEERING SHAFT

Number	Designation			Model 171
BA46.10-P-1001-01E	Bolt, steering coupling to steering shaft	Stage 1	Nm	30
		Stage 2	∠°	-

Fig 2: Identifying Holding Device (129 589 01 21 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1046-06A	Klueber Polylub GLY 801 grease	A 001 989 84 51