Remove/Install Rear Axle Speed Sensor - AR42.30-S-0714E

Model 447, 448 

Fig 1: Rear Axle Speed Sensor Components Location - Model 447

Courtesy of MERCEDES-BENZ USA

	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
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment	Model 447 with engine 780	AH00.00-Z-0300-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	General information on malfunctions in the brake system		AH42.30-D-2007-01KOA
	Remove/install
1	Raise vehicle.		AR00.60-S-1000E
2	Remove rear center underfloor paneling.	Model 447 with engine 654.9 with code CU4 (Aerodynamics package)	AR61.30-S-1001E
3	Remove screw (1).	Bolt, rpm sensor to steering knuckle	*BA42.30-Z-1001-02KOE
4	Remove left rear axle rotational speed sensor (L6/3) or right rear axle rotational speed sensor (L6/4) from semi-trailing arm.	Apply a thin coating of grease to left rear axle rotational speed sensor (L6/3) or right rear axle rotational speed sensor (L6/4). Long-life grease	*BR00.45-Z-1001-06A
5	Remove electrical wiring harness of left rear axle rotational speed sensor (L6/3) or right rear axle rotational speed sensor (L6/4).	To do so, open cable ties on underbody and semi-trailing arm. Replace cable ties.
6	Disconnect electrical connector for left rear rpm sensor (X62/21) or electrical connector for right rear rpm sensor (X62/22).	To do so, detach electrical connection for left rear rpm sensor (X62/21) or electrical connection for right rear rpm sensor (X62/22) from bracket (2).
7	Remove left rear axle rpm sensor (L6/3) or right rear axle rpm sensor (L6/4).
	Check
8	Check electric line of left rear axle rotational speed sensor (L6/3) or right rear axle rotational speed sensor (L6/4) for fractures or chafe marks.	If fractures or chafe marks are visible, ↓ Replace left rear axle rpm sensor (L6/3) or right rear axle rpm sensor (L6/4).
9	Install in the reverse order.

REAR AXLE RPM SENSOR

Number	Designation		Model 447, 448
BA42.30-Z-1001-02KOE	Bolt, rpm sensor to steering knuckle	Nm	8

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1001-06A	Long-life grease	A 000 989 63 51 11