Remove/Install Front Lower Transverse Control Arm - AR33.20-P-0510ME

Model 167 

MODIFICATION NOTES

13.03.2020	Pressure release of air suspension changed.	Operation step 2
13.03.2020	"Pressure release of electrohydraulic suspension", changed.	Operation step 3

Fig 1: Front Lower Transverse Control Arm Components Location - Model 167 (Left Side Shown)

Courtesy of MERCEDES-BENZ USA

Shown on left side of vehicle 

Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Information on E-ACTIVE BODY CONTROL suspension		AH32.50-P-0002-01ME
Notice	Notes on air suspension		AH32.22-P-1000-01T
	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-1102ME
2	Transfer the pneumatic pressure of the suspension strut 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) Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)
		The complete wheels must not touch the ground. Otherwise the suspension struts may suffer initial damage and malfunction at a later stage Select menu item "Actuations" in active suspension and damping system control unit. Transfer pneumatic pressure out of the central reservoir into the suspension strut using the diagnostic system.	AD00.00-P-2000-06ME
3	Drain the hydraulic pressure lines of the electrohydraulic suspension using guided diagnosis.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension) The complete wheels must not touch the ground. Otherwise the suspension struts may suffer initial damage and malfunction at a later stage. It is essential for shutoff valves on suspension strut to be closed.	AR32.50-P-0042ME
4	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
5	Remove center and rear engine compartment lining.		AR61.20-P-1105ME
6	Remove torsion bar linkage from stabilizer bar.	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) Remove torsion bar linkage carefully; stabilizer bar is under tension.	AR32.35-P-3330ME
		Bolt, stabilizer rod to stabilizer	*BA32.35-P-1002-02D
7	Remove nut (2) and remove bolt (3).	Tighten nut (2) lightly by hand. Apply final torque only after the vehicle is on the measuring platform or when the vehicle is in a neutral position. Otherwise, the elastomer bearing will be stretched.
		Self-locking nut, shock absorber to wishbone	*BA32.25-P-1002-01O
8	Remove nut (4) and remove lock plate.	Ensure that the lock plate placed behind it does not fall out. Counterhold nut over supporting joint (9) with suitable tool.
		Locking slotted nut, supporting ball joint to steering knuckle	*BA33.20-P-1005-01W
		Socket wrench	Fig 2
9	Remove nut (5) at rear elastomer bearing and remove screw (6).	Tighten nut (5) lightly by hand. Apply final torque only after the vehicle is on the measuring platform or when the vehicle is in a neutral position. Otherwise, the elastomer bearing will be stretched.
		Nut, lower transverse control arm to front axle carrier	*BA33.20-P-1004-01W
10	Remove nut (7) at front elastomer bearing and remove screw (8).	Tighten nut (7) lightly by hand. Apply final torque only after the vehicle is on the measuring platform or when the vehicle is in a neutral position. Otherwise, the elastomer bearing will be stretched.
		Nut, lower transverse control arm to front axle carrier	*BA33.20-P-1004-01W
11	Remove lower transverse control arm (1) with supporting joint (9).
12	Check supporting joint (9) for damage.	If there is a problem, ↓ Replace supporting joint (9).
			AR33.20-P-0440ME
		Self-locking nut, supporting joint to lower transverse control arm	*BA33.20-P-1003-01W
13	Install in the reverse order.
	Measure
14	Perform chassis alignment.		AR40.20-P-0200ME

FRONT AXLE SHOCK ABSORBER

Number	Designation			Model 167
BA32.25-P-1002-01O	Self-locking nut, shock absorber to wishbone	Stage 1	Nm	100
		Stage 2	∠°	180

FRONT AXLE STABILIZER BAR

Number	Designation			Model 167 except code 490 (Electrohydraulic suspension)
BA32.35-P-1002-02D	Bolt, stabilizer rod to stabilizer	Stage 1	Nm	80
		Stage 2	∠°	90

WHEEL CONTROL, HUB

Number	Designation			Model 167
BA33.20-P-1003-01W	Self-locking nut, supporting joint to lower transverse control arm	Stage 1	Nm	120
		Stage 2		45

WHEEL CONTROL, HUB

Number	Designation			Model 167
BA33.20-P-1004-01W	Nut, lower transverse control arm to front axle carrier	Stage 1	Nm	100
		Stage 2		180

WHEEL CONTROL, HUB

Number	Designation			Model 167
BA33.20-P-1005-01W	Locking slotted nut, supporting ball joint to steering knuckle	Stage 1	Nm	120
		Stage 2	∠°	45

Fig 2: Identifying Socket Wrench (167 589 00 09 00)

Courtesy of MERCEDES-BENZ USA