Knocking/rumbling noises from front axle on uneven roads - AF33.15-P-1120AG

MODEL 220 with CODE (Z07) Top protection

OPERATION NO. OF OPERATION TEXTS OR STANDARD TEXTS AND FLAT RATES

Category	Op. no.	Operation text	Time	Acc. no.	Code
P	023487	CHECK TORQUE STRUT JOINT ON FRONT AXLE FOR PLAY	002 WU/0.2 h	-	-
P	331421	REMOVE/INSTALL TORQUE STRUT (1) OF FRONT AXLE; REPLACE IF NECESSARY	010 WU/0.8 h	-	-
P	331422	REMOVE/ INSTALL TORQUE STRUTS (BOTH) FOR FRONT AXLE; REPLACE IF NECESSARY	016 WU /1.3 h	-	-
P	023485	CHECK Q-STATUS OF AIR SUSPENSION STRUT	002 WU/0.2 h	-	-
P	327383	REPLACE LEFT FRONT SUSPENSION STRUT FOR ADAPTIVE DAMPING SYSTEM (ADS)	012 WU/ 1.0 h	-	-
P	327384	REPLACE RIGHT FRONT SUSPENSION STRUT FOR ADAPTIVE DAMPING SYSTEM (ADS)	012 WU/ 1.0 h	-	-
P	327385	REPLACE FRONT SUSPENSION STRUTS (BOTH) FOR ADAPTIVE DAMPING SYSTEM (ADS)	020 WU/1.7 h	-	-
P	327340	RELIEF PRESSURE IN ADAPTIVE DAMPING SYSTEM (ADS)	002 WU/0.2 h	-	-
P	023835	REPLACE FRONT SPRING LINK (1) LOCATION	007 WU/0.6 h	-	-

Damage code	Cause	Remedy
33 140 36	Cause 1:	Remedy 1:
	Play in the torque strut joint.	Check torque strut joint for play: ↓
	Torque strut joint modified in production as of: vehicle ident no. 1A 242021	1 Raise vehicle. The wheels must not be under tension.
		2 Move torque strut in vertical direction up and down in the vicinity of the ball joint
		If transition play is perceptible: ↓
		3 Replace torque strut.	AR33.15-P-0160I
	Cause 2:	Remedy 2:
	Stop buffer insert on front axle air suspension strut too hard.	1 Check Q-status of front axle air suspension strut.
	Stop buffer modified in production as of: vehicle indent. no. 1A 219698	White sticker on air suspension strut.
		Q-status less than Q4: ↓
		2 Remove/install/replace suspension strut	AR32.25-P-1017I
	Cause 3:	Remedy 3:
	Insufficient lubricating properties of supporting bearing in spring link	If the above possible causes do not apply, replace supporting joint in spring link: ↓
		1 Remove suspension strut from bottom of spring link.
		2 Press and arrest suspension strut in direction of wheel.
		3 Remove and replace supporting joint (17d).
		Extraction and insertion tool	Fig 1
		4 Install in reverse sequence.

Fig 1: Identifying Extraction And Installation Tool (202 589 00 43 00)

G04840649

Fig 2: Identifying Front Axle Components

G04840650

PARTS ORDERING NOTES

Part no.	Designation	Quantity
220 330 51 11	Torque strut	As required
220 330 52 11	Torque strut	As required
220 320 76 13	Front axle suspension strut	As required
220 352 02 27	Support joint	As required