Remove/Install Left Front Or Right RPM Sensor - AR42.30-S-0712E

Model 447, 448 

Fig 1: Front RPM Sensors 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
	General information on malfunctions in the brake system		AH42.30-D-2007-01KOA
	Remove/install
1	Remove each fender liner from fender	The left front rpm sensor electrical connection (X62/26) or right front rpm sensor electrical connection (X62/27) must be accessible.	AR88.10-S-1300E
2	Detach left front rpm sensor electrical connection (X62/26) or right front rpm sensor electrical connection (X62/27)	To do so, unclip left front rpm sensor electrical connection (X62/26) or right front rpm sensor electrical connection (X62/27). Check retaining clip, inspect and, if necessary, replace.
3	Remove each bolt (1)	Bolt, rpm sensor to steering knuckle	*BA42.30-Z-1001-01KOA
4	Remove left front rpm sensor (L6/1) or right front rpm sensor (L6/2) from steering knuckle	Apply light coating of grease to left front rpm sensor (L6/1) or right front rpm sensor (L6/2). Long-life grease	*BR00.45-Z-1001-06A
5	Remove left front rpm sensor (L6/1) or right front rpm sensor (L6/2).	To do so, unclip electrical line from left front rpm sensor (L6/1) or right front rpm sensor (L6/2) from brackets (2, 3). Ensure bulb is correctly installed.
	Check
6	Check electrical line for breakage or chafe marks	Depending on findings ↓ Replace left front rpm sensor (L6/1) or right front rpm sensor (L6/2).
7	Install in the reverse order

FRONT AXLE RPM SENSOR

Number	Designation		Model 447, 448
BA42.30-Z-1001-01KOA	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