Remove/Install Rear Axle Crossmember - AR35.15-P-0250SR

MODEL 453 

MODIFICATION NOTES

20.06.2017	"Threaded rods for lowering rear axle crossmember", added.	Operation step 1
20.06.2017	"Check elastomer bearings of rear axle crossmember for damage and wear", added.	Operation step 11

Courtesy of MERCEDES-BENZ USA

Shown on model 453.3 

	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Remove
1	Prepare threaded rods (4) for lowering rear axle crossmember (1) Threaded rod for lowering rear axle crossmember		WF58.50-P-3515-01SR
2	Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Lift vehicle on vehicle lift	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. Align the turn plates so that the screws of the rubber pads on the turn plates cannot come into contact with vehicle parts while jacking up.	AS00.00-Z-0010-01A
3	Unscrew bolts (2)	Do not unscrew screws (3).
4	Screw nuts (5) onto both threaded rods (4) with washers
5	Screw threaded rods (4) into threaded holes for screws (2)
6	Adjust distance dimension (a) by twisting the nuts (5)	Distance dimension (a): approx. 25 mm
7	Remove screws (3) alternately	Otherwise the rear axle cross member (1) may become tilted on the threaded rods (4).
8	Lower rear axle crossmember (1) until it is free of tension by loosening nuts (5)	When lowering the rear axle cross member (1) make sure that it does not come into contact with the transmission housing. Otherwise this can lead to paint damage and corrosion on the rear axle cross member (1).
9	Remove threaded rods (4) from body	The nuts (5) and shims can remain loosely screwed onto the threaded rods (4), as they will be used again later on for assembly.
10	Unscrew nuts (6) and remove washers
11	Pull out screws (7) and remove rear axle crossmember (1) from control arms (8, 9)
	Check
12	Check control arm elastomer bearings (8, 9) for damage and wear	If there are problems → Replace appropriate elastomer bearing.
	Install
13	Position rear axle crossmember (1) on control arms (8, 9) and insert screws (7)
14	Position shims and screw on nuts (6) up to mounting surface
15	Screw threaded rods (4) through bores of rear axle cross member (1) into threaded holes for bolts (2)
16	Screw nuts (5) onto threaded rods (4) up to mounting surface of rear axle crossmember (1) on the body	Screw in nuts (5) alternately on right and left sides to avoid tilting the rear axle cross member (1) on the threaded rods (4). When positioning rear axle crossmember (1) on body, ensure that guide pins (10) are inserted into the body's corresponding threaded holes.
17	Tighten bolts (3)	Bolt, cross member for rear axle to body	*BA35.10-P-1001-03B
18	Remove threaded rods (4) from body
19	Tighten bolts (2)	Bolt, cross member for rear axle to body	*BA35.10-P-1001-03B
20	Lower vehicle with vehicle lift
21	Counterhold nuts (6) and tighten screws (7)	Only tighten screws (7) when the vehicle is completely lowered and deflected. Otherwise there may be initial damage caused by elastomer bearing tension on the control arms (8, 9). Bolts may only be tightened (7) when the vehicle is completely lowered and deflected. Bolt, control arm to cross member on rear axle	*BA35.15-P-1002-02G

REAR AXLE

Number	Designation		Model 453
BA35.10-P-1001-03B	Bolt, cross member for rear axle to body	Nm	70

TRAILING ARMS, WISHBONES

Number	Designation		Model 453
BA35.15-P-1002-02G	Bolt, control arm to cross member on rear axle	Nm	62