Remove/Install Front Suspension Strut - AR32.25-P-1017SA

Model 223

with code 490 (Electrohydraulic suspension)

MODIFICATION NOTES

09.09.2021	Screw/Bolt hydraulic line to shock absorber		BA32.50-P-1006-04B
18.08.2022	Special tool 167 589 01 09 00 added.	Operation step 9.
29.05.2023	Nut, front suspension strut to spring control arm	Model 223 except code Z07 (B7 armoring for special protection version)	BA32.25-P-1002-04O
29.05.2023	Nut, front suspension strut to spring control arm	Model 223 except code Z07 (B7 armour for special protection version)	BA32.25-P-1002-04O

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Fig 1: Front Suspension Strut Components Location - Model 223 With Code 490

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown with code M005 (Vehicles with 4-MATIC/all-wheel drive)

	Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning from swallowing hydraulic fluid.	Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Information on E-ACTIVE BODY CONTROL suspension		AH32.50-P-0002-01ME
Notice	Notes on air suspension		AH32.22-P-1000-01T
	Evaluation of elastomer bearings		AH00.10-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Remove/install
1	Remove corresponding front wheel.		AR40.10-P-1102A
2	Reduce pneumatic pressure of suspension struts (2) using diagnostic system.
		The complete wheels must not touch the ground. Otherwise the suspension struts (2) can be damaged and subsequently malfunction.	AD00.00-P-2000-06FR
3	Empty hydraulic lines (4) of electrohydraulic suspension using guided diagnosis	The complete wheels must not touch the ground. Otherwise the suspension struts (2) can be damaged and subsequently malfunction. It is essential for the shutoff valves on the suspension strut (2) to be closed	AR32.50-P-0042S
4	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
5	Remove cover over suspension strut (2) at top.
6	Detach pressure line (1) from suspension strut (2) and seal openings with suitable stop plugs.	Do not crush or kink the pressure line (1) and do not subject it to tension. This will cause damage to the pressure line (1) and can impair its function. Clean the area around the pressure line connections before beginning repair work. Do not use any cleaning agents or solvents. Pressure line to front suspension strut/valve	*BA32.22-P-1010-03F
		Socket wrench bit	Fig 2
		Record plug	Fig 6
7	Remove nuts (3).	Nut, suspension strut at front to body	*BA32.25-P-1001-04O
8	Clean connections of hydraulic lines (4).	Do not use any cleaning agents or solvents.
9	Remove hydraulic lines (4) from suspension strut (2) and seal openings with suitable stop plugs.	: Replace sealing rings. Screw, hydraulic line to suspension strut	*BA32.50-P-1006-04B
		Socket wrench bit	Fig 4
		Record plug	Fig 6
10	Disconnect electrical connectors (5).
11	Open holder (6) and expose electric lines (7).
12	Open holder (8) and unhook brake hose (9).
13	Secure steering knuckle (11) to prevent it from folding down.
14	Remove upper transverse control arm (12) from steering knuckle (11).	Model 223 with code 490 (Electrohydraulic suspension) except code Z07 (B7 armoring on special protection version) Nut, steering knuckle to transverse control arm	*BA33.20-P-1006-01T
15	Remove suspension strut (2) from spring link (13).	Nut, suspension strut at front to spring control arm	*BA32.25-P-1002-04O
16	Remove suspension strut (2).
	Check
17	Check suspension strut (2) for damage.
		If there is a problem, ↓ Replace suspension strut (2).	AP32.25-P-3255K
18	Check pressure line (1) for damage.	If there is a problem, ↓ repair pressure line connection.	AR32.22-P-2001-01S
		Knife	Fig 3
		Box wrench bit	Fig 5
		Socket wrench bit	Fig 2
19	Install in the reverse order.

AIR SUSPENSION

Number	Designation		Model 223
BA32.22-P-1010-03F	Pressure line to front suspension strut/valve block	Nm	2

SUSPENSION STRUTS

Number	Designation		Model 223 with code Z07 (B7 armoring on special protection version)	Model 223 except code Z07 (B7 armoring on special protection version)
BA32.25-P-1001-04O	Nut, suspension strut at front to body	Nm	50	50

SUSPENSION STRUTS

Number	Designation			Model 223 with code Z07 (B7 armoring on special protection version)	Model 223 except code Z07 (B7 armoring on special protection version)
BA32.25-P-1002-04O	Nut, suspension strut at front to spring control arm	Stage 1	Nm	70	120
BA32.25-P-1002-04O	Nut, suspension strut at front to spring control arm	Stage 2	∠°	270	45

ELECTROHYDRAULIC SUSPENSION

Number	Designation			Model 223 with code 490 (Electrohydraulic suspension)
BA32.50-P-1006-04B	Screw, hydraulic line to suspension strut	Stage 1	Nm	18
BA32.50-P-1006-04B	Screw, hydraulic line to suspension strut	Stage 2	∠°	45

WHEEL CONTROL, HUB

Number	Designation			Model 223 except code Z07 (B7 armoring on special protection version)
BA33.20-P-1006-01T	Nut, steering knuckle to transverse control arm	Stage 1	Nm	50
BA33.20-P-1006-01T	Nut, steering knuckle to transverse control arm	Stage 2	∠°	45

Fig 2: Identifying Socket Wrench Bit (211 589 00 09 00)

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Fig 3: Identifying Knife (000 589 12 28 00)

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Fig 4: Identifying Socket Wrench Bit (167 589 01 09 00)

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Fig 5: Identifying Box Wrench Bit (001 589 00 03 00)

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Fig 6: Identifying Record Plug (129 589 00 91 00)

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