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

Model 167 

except code 489 (AIRMATIC Dual Control/semi-active air suspension) 

except code 490 (Electrohydraulic suspension) 

Model 167 

with code 489 (AIRMATIC Dual Control/semi-active air suspension) 

except code 490 (Electrohydraulic suspension) 

Fig 1: Front Suspension Strut Components Location - Model 167 With/Without Code 489 Except Code 490 (Shown With Code 489)

Courtesy of MERCEDES-BENZ USA

Shown on model 167 with code 489 (AIRMATIC) except 490 (Electrohydraulic suspension) 

	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	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	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 front left or right wheel and tire assembly.		AR40.10-P-1102ME
2	Transfer the pneumatic pressure of suspension strut (1) into the central reservoir using the diagnostic system.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension)
		The complete wheels must not touch the	AD00.00-P-2000-06ME
		ground. Otherwise the suspension struts (1) can be predamaged and subsequently malfunction.
		Select menu item "Actuations" in active suspension and damping system control unit.
		Transfer pneumatic pressure out of the central reservoir into suspension strut (1) using the diagnostic system.
3	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
4	Open hood and remove covers over suspension strut (1) at top.
5	Detach pneumatic pressure line (2) from suspension strut (1) and seal openings with suitable stop plugs.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Do not stretch, crush or kink pneumatic pressure line (2). This will result in damage to pneumatic pressure line (2) and can impair its function.
		Before beginning repair work, clean the area around the pneumatic pressure line connections. Do not use any cleaning agents or solvents.
		Air suspension pressure line at suspension strut at front	*BA32.22-P-1005-03B
		Box wrench bit	Fig 5
		Record plug	Fig 2
		Socket wrench bit	Fig 3
6	Remove nuts (3) at top from suspension strut (1).	Nut, shock absorber on front end	*BA32.25-P-1001-01O
7	Remove holder (4) with sensor and electrical wiring harness and place to one side.
8.1	Unhook left front level sensor from upper transverse control arm (12).	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) When removing the left suspension strut (1).	AR82.10-P-0006ME
8.2	Unhook right front level sensor from upper transverse control arm (12).	When removing the right suspension strut (1).
		Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 613 (headlights left-hand-traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 620 (Right-hand traffic headlamps) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 631 (Static LED headlamps, left-hand traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 632 (Headlamps, LED, static, right-side traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 640 (SAE dynamic LED headlamps right-hand traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 641 (Dynamic LED headlamps, left-hand traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 642 (Dynamic LED headlamps, right-hand traffic) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension)	AR82.10-P-0006ME
9	Release electrical connectors (5), disconnect and remove from suspension strut (1).	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) The number of electrical connectors (5) varies depending on the vehicle equipment.
10	Disconnect electrical connector (6) and expose wiring harness of steering knuckle (8) and suspension strut (1).	Do not crush or kink or subject electric lines to tension. This will result in damage to the electric lines and can impair their function.
11	Detach holder (7) from suspension strut (1) and place to one side with electrical wiring harnesses.	The design of holder (7) varies depending on the vehicle equipment.
12	Detach tie rod (9) from steering knuckle (8).		AR46.40-P-0200ME
13	Release front axle shaft (10) from steering knuckle (8).	Model 167 with engine 176, 177, 256.9 except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with engine 176, 177, 256.9 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with engine 264 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code M005 (Vehicles with 4 mATIC/all-wheel drive) except code 490 (Electrohydraulic suspension) Model 167 with engine 264 with code M005 (Vehicles with 4 mATIC/all-wheel drive) except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension)	AR33.30-P-0620MSC
		Model 167 with engine 654.9, 656 except code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with engine 654.9, 656 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension)	AR33.30-P-0620OID
14	Detach torsion bar linkage (11) from steering knuckle (8).		AR32.35-P-3330ME
15	Remove nut (13) from upper transverse control arm (12).	Self-locking nut, upper ball joint out of upper transverse control arm to steering knuckle	*BA33.20-P-1001-01W
16	Detach upper transverse control arm (12) from steering knuckle (8).
17	Secure suspension strut (1) using suitable means to prevent it from falling down.
18	Remove nut (14) and screw (15).	Self-locking nut, shock absorber to wishbone	*BA32.25-P-1002-01O
19	Push steering knuckle (8) downward and remove suspension strut (1).	Helper required
20	Check pneumatic pressure line (2) and pneumatic pressure line connection at top of suspension strut (1) for damage.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) If there is a problem, ↓ repair corresponding component part.	AR32.22-P-2001-01ME
		Air suspension pressure line at suspension strut at front	*BA32.22-P-1005-03B
		Box wrench bit	Fig 6
		Knife	Fig 4
		Box wrench bit	Fig 5
		Socket wrench bit	Fig 3
	Check
21	Check elastomer bearing in lower control arm (16) for wear and damage.	If there is a problem, ↓ Replace elastomer bearing.
			AR32.25-P-0107ME
22	Check suspension strut (1) for damage.	If there is a problem, ↓ replace suspension strut (1).
23	Install in the reverse order.

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Socket Wrench Bit (211 589 00 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Knife (000 589 12 28 00)

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Box Wrench Bit (000 589 75 03 00)

Courtesy of MERCEDES-BENZ USA