Remove/install rack-and-pinion steering - AR46.20-P-0600MCC

MODEL 451.3/4 except CODE (V26) Power steering, EPS (FFO) 

Fig 1: Identifying Rack-And-Pinion Steering Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Rack-And-Pinion Steering Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Evaluating steering rack when repairing accident vehicles		AH46.20-P-9409-01SM
	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.	AS00.00-Z-0010-01A
1	Raise vehicle using the vehicle lift and remove underfloor paneling	Rechargeable drill/screwdriver
2	Remove front bulkhead	The front bulkhead is attached with two nuts.
3	Loosen nut (3) on steering coupling (2) until it can be turned by hand	Do not unscrew the nut (3) completely otherwise the bolt (4) may fall out and the steering coupling (2) become separated. The consequence of this is that with the front wheels in the straight ahead position the fanfare horns and airbag clock spring contact may be damaged. Turn the front wheels onto lock until the nut (3) is accessible.
4	Lower vehicle with vehicle lift
5	Place the front wheels in the straight-ahead position and block the steering wheel using the holding device	Hold the steering wheel firmly otherwise the fanfare horns and airbag clock spring contact may be damaged. Holding device	Figure
6	Raise vehicle with vehicle lift
7	Unscrew nut (3) on the steering coupling (2), remove bolt (4) and slide steering coupling (2) upwards off the rack-and-pinion steering (1)	Only use the bolt (4) and nut (3) approved for model 451. Bolts and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection. When the nut (3) is loosened, the cam-shaped bolt (4) rotates with it approx. half a revolution. However, the bolt (4) does not have to be counterheld. Check the steering coupling (2) for ease of movement and replace if necessary.
8	Remove front wheels	* for USA only	AR40.10-P-1100MCU
		* not for USA	AR40.10-P-1100MCC
9	Unscrew nut (5) on left and right tie rod end (6), pry off left and right and tie rod end (6) with puller and unhook	Press out tie rod ends (6) carefully in order to avoid damage to the rubber boots. Puller	Figure
10	Loosen refrigerant lines (14) from bracket (13) in the area of the battery recess and unscrew bracket (13)	On vehicles with code (I01) Air conditioning Plus
11	Unscrew nuts (7) and remove retaining clamps (8) from stabilizer bar (10)	The retaining clamps (8) are 2-piece.
12	Pull stabilizer bar (10) forwards and fold away downwards
13	Remove bolts (11)
14	Turn rack-and-pinion steering (1) forwards and guide out over the left wheel well
	Checking
15	Check rubber mounts for attaching the rack-and-pinion steering (1) for damage	Check rubber mounts on the rack-and-pinion steering (1) and replace if necessary. See: ↓ Remove/install rubber mount of rack-and-pinion mounting	AR46.20-P-0600-02SM
		Lubricant paste	*BR00.45-Z-1002-06A
	Install
16	Mount the rack-and-pinion steering (1) over the left wheel well on the front axle carrier (12)
17	Tighten bolts (11)		*BA46.20-P-1001-01G
18	Fold stabilizer bar (10) upwards and position
19	Insert retaining clamps (8) at a right angle to the stabilizer bar (10) and tighten nuts (7)	Check rubber mount (9) and replace if necessary. The opening of the rubber mounts (9) must point in the direction of travel.	*BA32.20-P-1003-02I
20	Position bracket (13) of refrigerant lines (14) on the underbody, tighten and clip refrigerant lines (14) into bracket (13)	On vehicles with code (I01) Air conditioning Plus
21	Engage left and right tie rod end (6) in the steering knuckle and tighten nuts (5)	Replace self-locking nut (5). Check the rubber boots; replace the tie rod end (6) if necessary.	*BA46.40-P-1001-01F
22	Mount front wheels	* for USA only	AR40.10-P-1100MCU
		* not for USA	AR40.10-P-1100MCC
23	Mount steering coupling (2) on the rack-and-pinion steering (1), insert bolt (4) and screw on nut (3)	Replace nut (3) and bolt (4). Only use the bolt (4) and nut (3) approved for model 451. Bolts and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection. Ensure that the front wheels are in the straight-ahead position. The nut (3) of steering coupling (2) will be tightened later.
24	Lower vehicle with vehicle lift
25	Remove retainer from steering wheel	Holding device	Figure
26	Raise vehicle with vehicle lift
27	Tighten nut (3) on steering coupling (2)	Turn the front wheels onto lock until the nut (3) is accessible.	*BA46.10-P-1001-01F
28	Install front bulkhead
29	Install underfloor paneling	Rechargeable drill/screwdriver
30	Perform wheel alignment check	When replacing the rack-and-pinion steering (1). Depending on the workshop equipment select between the measurement variant with recording the vehicle level or without recording the vehicle level. without recording the vehicle level	AR40.20-P-0200MCC
		with recording the vehicle level	AR40.20-P-0200MCE

FRONT AXLE STABILIZER BAR

Number	Designation		Model 451.3/4
BA32.20-P-1003-02I	Nut, stabilizer bar to retaining clamp	Nm	95

STEERING SHAFT

Number	Designation		Model 451.3/4
BA46.10-P-1001-01F	Bolt, steering coupling to rack-and-pinion steering	Nm	20

STEERING GEAR

Number	Designation			Model 451.3/4
BA46.20-P-1001-01G	Bolt, rack-and-pinion steering to front axle carrier	Stage 1	Nm	70
		Stage 2	∠°	-

TIE ROD

Number	Designation		Model 451.3/4
BA46.40-P-1001-01F	Self-locking nut, tie rod to steering knuckle	Nm	34

Fig 3: Identifying Holding Device (129 589 01 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Puller (450 589 01 33 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1002-06A	Lubricating paste, rubber parts 2.5 kg, DB supply specification 6867.00	A 000 989 01 60