Disassemble/Assemble Suspension Strut - AR32.25-P-1018ME

Model 167

Except Code 489 (AIRMATIC Dual Control/semi-active air suspension)

Except Code 490 (Electrohydraulic suspension)

Courtesy of MERCEDES-BENZ USA

	Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension	Use only approved tensioning devices; additionally screen off hazardous area if necessary. Check special tools for damage and proper operation (visual inspection). Wear protective gloves.	AS00.00-Z-0001-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
	Remove
1	Remove suspension strut concerned.		AR32.25-P-1017ME
	Disassemble
2	Clamp tensioning device (10) in vise and insert clamping plates (8, 9).	Tensioning device	Fig 3
		Clamping plates	Fig 2
3	Insert suspension strut into tensioning device (10).	When inserting suspension strut, attempt to get as many windings of spring (7) as possible in spring clamp.
		Clamping plates	Fig 2
		Tensioning device	Fig 3
4	Clamp spring (7) until upper spring retainer (3) is relieved.	The spring (7) must not be tensioned to a length less than 180 mm (measured from spring end to spring end).
		Clamping plates	Fig 2
		Tensioning device	Fig 3
5	Unscrew nut (2); when doing so, counterhold piston rod of shock absorber (11).	Clamping plates	Fig 2
		Tensioning device	Fig 3
		Socket set	Fig 1
6	Remove shock absorber (11).	Clamping plates	Fig 2
		Tensioning device	Fig 3
7	Remove dust boot (6) and stop buffer (5).	Clamping plates	Fig 2
		Tensioning device	Fig 3
8	Release tensioning device (10) and remove spring (7) with upper spring retainer (3) and spring seat (4).	Tensioning device	Fig 3
		Clamping plates	Fig 2
	Check
9	Check shock absorber (11).		AR32.25-P-0121ME
10	Check dust boot (6), stop damper (5) and spring seat (4) for wear and damage.	If there is a problem, ↓ replace corresponding component part.
	Assemble
11	Tension spring (7) using tensioning device (10).	The spring (7) must not be tensioned to a length less than 180 mm (measured from spring end to spring end).
		Tensioning device	Fig 3
		Clamping plates	Fig 2
12	Position spring (7) on shock absorber (11).	Clamping plates	Fig 2
		Tensioning device	Fig 3
13	Position dust boot (6), stop damper (5), spring seat (4) and upper spring retainer (3) on shock absorber (11) and spring (7).	Clamping plates	Fig 2
		Tensioning device	Fig 3
14	Adjust total thickness of shims.	The shims are located between the upper spring retainer (3) and the spring seat (4). The thickness as well as the number of shims depends on the load group of the spring (7), maximum stack height 20 mm.
		Clamping plates	Fig 2
		Tensioning device	Fig 3
15	Position nut (2).	Clamping plates	Fig 2
		Tensioning device	Fig 3
16	Align upper spring retainer (3) before tightening nut (2).	Pay attention to installation position.
		Clamping plates	Fig 2
		Tensioning device	Fig 3
17	Tighten nut (2); when doing so, counterhold piston rod of shock absorber (11).	Nut to piston rod	*BA32.25-P-1003-01O
		Tensioning device	Fig 3
		Clamping plates	Fig 2
		Socket set	Fig 1
18	Detension spring (7) until tensioning device (10) is relieved of load.	Tensioning device	Fig 3
		Clamping plates	Fig 2
19	Remove suspension strut from tensioning device (10).	Clamping plates	Fig 2
		Tensioning device	Fig 3
20	Remove spring plates (8, 9) from tensioning device (10).	Clamping plates	Fig 2
		Tensioning device	Fig 3
21	Loosen vise and remove tensioning device (10).	Clamping plate	Fig 2
		Tensioning device	Fig 3
	Install
22	Install suspension strut.	Model 167 except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension)	AR32.25-P-1017ME
23	Check headlamp adjustment and correct if necessary.
			AP82.10-P-8260Q