Remove/install spring control arm on front axle - AR33.15-P-0170RK

MODEL 231 

Fig 1: Spring Control Arm On Front Axle Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	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
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Notes on Active Body Control suspension		AH32.50-P-0001-01LF
	Notes on Active Body Control suspension		AH32.50-P-0001-01N
	Remove/install
1	Detach front wheel and tire assembly
			AP40.10-P-4050EW
2.1	Release pressure in ABC system	Model 231.### ## up to 021273 with code 487 (Active Body Control (ABC))	AR32.50-P-0001-01N
		Bleed screw on soldered fitting in hydraulic line	*BA32.50-P-1001-02B
2.2	Release pressure in ABC system using diagnostic system	Model 231.### ## as of 021274 with code 487 (Active Body Control (ABC))
			AD00.00-P-2000-04A
			AR32.50-P-0001-01LF
3	Remove middle and rear engine compartment paneling		AR61.20-P-1105RK
4	Unscrew nut (9) and remove torsion bar linkage (7) from torsion bar pivot bushing (8)	Model 231 except code 487 (Active Body Control (ABC)) Nut, torsion bar linkage to spring control arm	*BA32.20-P-1001-02H
5	Unscrew nut (1) and pull bolt (5) out of spring control arm (2)	Nut, suspension strut for front axle to spring control arm	*BA32.25-P-1002-04N
6	Unscrew nut (12) and detach spring control arm (2) from steering knuckle (10)	The ball head must be counterheld and an impact wrench/driver must not be used. Otherwise, the ball head or steering knuckle (10) may be damaged. Nut, spring control arm to steering knuckle	*BA33.20-P-1001-01S
7	Unscrew nut (3) and pull bolt (11) out of front axle carrier (4)	Bolt, spring control arm to front axle carrier	*BA33.20-P-1002-01S
8	Remove spring control arm (2) downwards
	Check
9	Check elastomer bearing in spring control arm (2) for damage and replace if necessary.		AR33.15-P-0170-02RK
		Press-in tool	Fig 3
		Extraction and insertion tool	Figure
10	Check seal bellows and ball joint in spring control arm (2) for damage and replace if necessary
11	Check torsion bar pivot bushing (8) in spring control arm (2) and replace if necessary	Model 231 except code 487 (Active Body Control (ABC))	AR32.20-P-0310RK
12	Install in the reverse order
13	Fill and bleed ABC system	Model 231 with code 487 (Active Body Control (ABC)) Fill up and vent the Active-Body-Control (ABC) system	AR32.50-P-0021SX

FRONT AXLE TORSION BAR

Number	Designation		Model 231
BA32.20-P-1001-02H	Nut, torsion bar linkage to spring control arm	Nm	130

SUSPENSION STRUTS

Number	Designation			Model 231
BA32.25-P-1002-04N	Nut, suspension strut for front axle to spring control arm	Stage 1	Nm	110
		Stage 2	∠°	90

ACTIVE BODY CONTROL, LINES

Number	Designation			Model 231 with code 487
BA32.50-P-1001-02B	Bleed screw on soldered fitting in hydraulic line	M10 x 1	Nm	20

WHEEL CONTROL, HUB

Number	Designation		Model 231
BA33.20-P-1001-01S	Nut, spring control arm to steering knuckle	Nm	250

WHEEL CONTROL, HUB

Number	Designation			Model 231
BA33.20-P-1002-01S	Bolt, spring control arm to front axle carrier	Stage 1	Nm	100
		Stage 2	∠°	180

Fig 2: Identifying Extraction And Insertion Tool (220 589 06 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Press-In Tool (211 589 00 43 00)

Courtesy of MERCEDES-BENZ USA