Remove/install rear axle speed sensor - AR42.30-P-0714GX

MODEL 463.270/ 271 

Shown: right rear 

Fig 1: Identifying Rear Axle Speed Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Frame Plug Connection, 22-Pin And Wiring Loom

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Opening On Vehicle Floor

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning and caustic burns  caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries	No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
	Notes on battery	All models	AH54.10-P-0001-01A
1	Activate Service mode in Tele-Aid emergency call system	Only for model 463.270	AR82.95-P-0005-03GR
	Notes regarding the Tele-Aid emergency call system	Model 463.243/244/245/247/248/250/254/270/309/322/323/332/333 with Tele-Aid car telephone emergency call system, code ET2	AH82.95-P-0001-01GA
2	Disconnect battery ground cable		AR54.10-P-0003G
3	Remove parking brake shoes		AR42.20-P-0530GX
4	Pull left rear rpm sensor (L6/3) or right rear rpm sensor (L6/4) out of the bushing in the brake carrier (1)	Installation:  Adjust the distance of the left rear rpm sensor (L6/3) and right rear rpm sensor (L6/4) to the measuring ring (3). Clean bushing in the brake carrier (1) before installing the left rear rpm sensor (L6/3) and right rear rpm sensor (L6/4). Feeler gauge	*BE42.30-P-1001-01A
5	Check measuring ring (3) of wheel hub for damage and replace if necessary		AR42.30-P-0160GX
6	Remove bronze sleeve (2).	Check measuring sleeve (2) for damage and replace if necessary. Installation:  When installing press the measuring sleeve (2) together lightly.
7	Remove TV tuner	Model 463.243/244/245/247/250/254/ 270/271/309/322/323/332/333 with TV tuner code EM9 model 463.248 except special protection version code 979	AR82.85-P-7366GR
8	Remove CD changer	Only for CD changer, code EP5.	AR82.64-P-7508GR
9	Disconnect frame connector (22-pin) (X92/3)
10	Remove electrical line of left rear rpm sensor (L6/3) and right rear rpm sensor (L6/4) from the frame connector (22-pin) (X92/3)	Remove pins 19, 20, 21, 22.
11	Disconnect all connectors on the wiring harness (4)
12	Remove left rear wheel lining
13	Guide wiring harness (4) outwards through the opening on the vehicle floor (5)
14	Detach wiring harness (4) from vehicle underfloor
15	Remove holder of electrical line of right rear right rear rpm sensor (L6/4)
16	Detach electrical line of left rear rpm sensor (L6/3) and right rear right rear rpm sensor (L6/4) from wiring harness (4)
17	Install in the reverse order
18	Deactivate service mode in TELE AID emergency call system	Only on model 463.270 with code: Tele-Aid car phone emergency call system ET2	AR82.95-P-0005-03GR
19	Read out fault memory using STAR DIAGNOSIS and erase faults if necessary	Stored faults which may result from wires being disconnected or from simulation during assembly or testing have to be processed and erased in the fault memories after completing the work.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS Compact diagnosis system for passenger cars, order no. 6511 1801 00

TEST VALUE FOR REAR AXLE RPM SENSOR

Number	Designation		Model 463.202/222/236/ 237/243/244/245/ 246/247/248/249/ 250/254/270/271/ 303/306/309/322/ 323/332/333/336/ 340/341/346
BE42.30-P-1001-01A	Set value between rpm sensor and measuring ring	mm	0.7 (±0.05)