Check / adjust the sensor setting of Distronic (DTR) - AR30.30-P-1000R

MODEL 164, 209, 211, 215, 216, 219, 220, 221, 230, 240, 251 with CODE (219) Distronic (DTR)

MODEL 216, 221 with CODE (233) Distronic Plus

Shown on model 230 with an arched radar sensor

Fig 1: Identifying Distronic Sensors - Shown On Model 230 With Arched Radar Sensor

Fig 2: Identifying Distronic Sensor Adjustment - Shown On Model 230

shown on model 230

Vehicle with an arched radar sensor

Fig 3: Checking Distronic Sensor Setting For Vehicle With Arched Radar Sensor

Vehicle with a radar sensor that is not arched (flat)

Fig 4: Checking Distronic Sensor Setting For Vehicle With Radar Sensor

Fig 5: Identifying Reticule Center

	Measuring, adjusting
	Risk of injury to skin and eyes from laser beams	Never look directly into the laser beam. Do not attempt to suppress natural reflex of eyelids. Avoid direct skin contact with the laser beam. If damage to the eye is suspected, consult an eye specialist immediately.	AS30.30-Z-0001-01A
1	Conduct quick test with STAR DIAGNOSIS		*WH58.30-Z-1048-13A
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
	Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
2	Open engine hood	Model 164	AR88.40-P-1000GZ
		Model 209	AR88.40-P-1000Q
		Model 211	AR88.40-P-1000T
		Model 219	AR88.40-P-1000TX
		Model 215, 220 Model 216, 221	AR88.40-P-1000M
		Model 230	AR88.40-P-1000R
		Model 240 except 240.179 Model 240.179	AR88.40-P-1000H
		Model 251	AR88.40-P-1000RT
3.1	Remove radiator trim	Model 164 Model 216	AR88.40-P-4001GZ
		Model 219	AR88.40-P-4001TX
		Model 230	AR88.40-P-4001R
		Model 251	AR88.40-P-4001RT
3.2	Remove bumper	Model 240 except 240.179 Model 240.179	AR88.20-P-2000H
4	Check DTR radar sensor (A89b1, B29)	Only conduct visual test on mechanical damages.. Check if: DTR radar sensor (A89b1, B29) is damaged or dirty Connectors (9) are loose On the DTR radar sensor (A89b1) only one connector is available. Clips (10) for mounting adjusting bolts (3a, 3b, 3c) are loose or defective Spacers between clips (10) for mounting adjusting bolts (3a, 3b, 3c) and the DTR radar sensor (A89b1, B29) are available.
5	Align front wheels to the geometric driving axle	The front wheels must be aligned to the geometric driving axle. Measure chassis if necessary.
6	Remove front measuring heads from the quick tensioning holders
7	Fit the measuring rods (1) onto the quick tensioning holders in place of measuring heads
8	Attach the spacer ring (8) to the DTR radar sensor (A89b1)	Only for vehicles with non-arched (flat) DTR radar sensor (A89b1).
			*WH58.30-Z-1053-12A
9	Align headlamp adjustment testing unit (2) to vehicle and carry out height adjustment to position of DTR radar sensor (A89b1, B29)	Observe operating instructions of headlamp adjustment testing unit (2). Headlamp adjustment testing unit (2) must stand on even surface, parallel to contact patch. Set headlamp range adjustment at headlamp adjustment testing unit (2) to "0".
		Headlamp adjustment testing unit	*WE58.40-Z-1006-19A
10	Fit optical adjusting device (5) with distance pins (5b) onto DTR radar sensor (A89b1, B29) and firmly suction using the hand vacuum pump (6)	In order to secure the optical adjusting device (5) from falling down, hang up fastening strap (4) at vehicle. In order to guarantee a secure seating of optical adjusting device (5) on DTR radar sensor (A89b1, B29), vaseline should be applied to the rubber lip of suction bell and the hand vacuum pump (6) should be evacuated from 600 to 700 mbar.
		DISTRONIC adjusting device	*WE58.40-Z-1004-19A
		Hand vacuum pump	Fig 6
11	Align headlamp adjustment testing unit (2) to vehicle	For alignment look into overhead mirror (2/1). Align headlamp adjustment testing unit (2) by rotating (arrow) around the vertical axis, in such a way, that the right and the left sounding rods (1) overlap with mirror reticule (2/1a) in the overhead mirror (2/1).
12	Connect optical adjusting device (5) to cigarette lighter	On vehicles with Keyless Go Code 889: press the Keyless Go start and stop pushbutton once without depressing the brake pedal - the laser in the optical adjusting device (5) is activated. On vehicles without Keyless Go: turn ignition key to position "1" - the laser in the optical adjusting device (5) is activated.
13	Connect STAR DIAGNOSIS and starting off automatic calibration level	Only for vehicles with AIRmatic, code 489 or with Active Body Control (ABC), code 487.
14	Read off point of impact of laser beam in headlight adjustment testing unit (2)	Point of impact and graticule center (7) must match.
15	Adjust horizontal adjustment of DTR radar sensor (A89b1, B29), for this step bring point of impact to height of reticule center (7) by twisting adjusting bolt (3a) at DTR radar sensor (A89b1, B29) in the headlamp adjustment testing unit (2)	In case of a correction, ensure that the adjustment screw (3a) is turned counterclockwise by one piece first (eliminate threaded play). The adjusting bolt (3b) is only to be twisted in the case that the range of adjustment of adjusting bolts (3a, 3c), would not be adequate for a correction.
16	Set vertical adjustment of DTR radar sensor (A89b1, B29); for this step point of impact must overlap with the reticule center (7) in the headlamp adjustment testing unit (2) through twisting of the adjusting bolt (3a) at the DTR radar sensor (A89b1, B29)	For vertical alignment of optical adjusting device (5), observe bubble level (5a). In case of a correction, ensure that adjustment screw (3c) is turned counterclockwise by one piece first (eliminate threaded play). The adjusting bolt (3b) is only to be twisted in the case, that range of adjustment of the adjusting bolts (3a, 3c), would not be adequate for a correction.
17	Remove optical adjusting device (5)	Remove vaseline from the DTR radar sensor (A89b1, B29).
18	Remove the spacer ring (8) of the DTR radar sensor (A89b1)	Only for vehicles with non-arched (flat) DTR radar sensor (A89b1). The spacer ring (8) must be removed to ensure that DTR radar sensor (A89b1) functions correctly.
19	Reset the learning values with STAR DIAGNOSIS
20.1	Install radiator trim	Model 164 Model 216	AR88.40-P-4001GZ
		Model 219	AR88.40-P-4001TX
		Model 230	AR88.40-P-4001R
		Model 251	AR88.40-P-4001RT
20.2	Install bumper	Model 240 except 240.179 Model 240.179	AR88.20-P-2000H
21	Close engine hood	Model 164	AR88.40-P-1000GZ
		Model 209	AR88.40-P-1000Q
		Model 211	AR88.40-P-1000T
		Model 219	AR88.40-P-1000TX
		Model 215, 220 Model 216, 221	AR88.40-P-1000M
		Model 230	AR88.40-P-1000R
		Model 240 except 240.179 Model 240.179	AR88.40-P-1000H
		Model 251	AR88.40-P-1000RT

Fig 6: Identifying Hand Vacuum Pump (001 589 73 21 00)

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1053-12A	Spacer ring and compressed air connection, Company Polytec GmbH D-76337 Waldbronn
WH58.30-Z-1048-13A	STAR DIAGNOSIS diagnosis system, Compact Passenger Car	6511 1801 00

WORKSHOP EQUIPMENT

WE58.40-Z-1004-19A	DISTRONIC adjusting device
WE58.40-Z-1006-19A	Headlamp adjustment testing unit