Remove/Install Distronic Sensor (DTR) - AR30.30-P-1010LF

Model 217 

with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) 

with code 237 (Active Blind Spot Assist) 

with code 238 (Active lane keeping Assist) 

with code 266 (DISTRONIC PLUS with Cross-Traffic Assist (DTR+Q)) 

with code 268 (Brake Assist System Plus) 

with code 269 (Brake Assist PLUS with Cross-Traffic Assist (BAS+Q) 

with code 271 (Autonomous brake intervention/pedestrian protection) 

with code 300 (PRE-SAFE® Brake) 

with code P20 (Driving assistant package Plus) 

Model 222 

with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) 

with code 237 (Active Blind Spot Assist) 

with code 238 (Active lane keeping Assist) 

with code 266 (DISTRONIC PLUS with Cross-Traffic Assist (DTR+Q)) 

with code 268 (Brake Assist System Plus) 

with code 269 (Brake Assist PLUS with Cross-Traffic Assist (BAS+Q) 

with code 271 (Autonomous brake intervention/pedestrian protection) 

with code 300 (PRE-SAFE® Brake) 

Shown on model 222 

Courtesy of MERCEDES-BENZ USA

Topical note	Notes on preventing damage to electronic components due to a magnetic tool		AH54.00-P-0002-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Switch off ignition and store transmitter key outside of transmission range (at least 2 m)
2.1	Remove radiator trim	Model 222 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) with code 237 (Active Blind Spot Assist) with code 238 (Active lane keeping Assist) with code 266 (DISTRONIC PLUS with Cross Traffic Assist (DTR+Q)) with code 268 (Brake Assist System Plus) with code 269 (Brake Assist PLUS with Cross-Traffic Assist (BAS+Q) with code 271 (Autonomous brake intervention/pedestrian protection) with code 300 (PRE-SAFE® Brake)	AR88.40-P-4001LF
2.2	Remove Mercedes star in radiator trim	Model 217 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) with code 237 (Active Blind Spot Assist) with code 238 (Active lane keeping Assist) with code 266 (DISTRONIC PLUS with Cross Traffic Assist (DTR+Q)) with code 268 (Brake Assist System Plus) with code 269 (Brake Assist PLUS with Cross-Traffic Assist (BAS+Q) with code 271 (Autonomous brake intervention/pedestrian protection) with code 300 (PRE-SAFE® Brake) with code P20 (Driving assistant package Plus)	AR88.40-P-4050LC
3	Disconnect electrical connection (1)
4	Remove screws/bolts (2) and long range radar sensor at the front (B29) with bracket
5	Unscrew nuts (3) and long range radar sensor at the front (B29) from bracket	When replacing long range radar sensor at the front (B29).
6	Install in the reverse order
	Initialization
7	Perform initialization of long range radar sensor at the front (B29) using diagnostic system
		Initialization is necessary: When replacing or detaching/attaching the long range radar sensor at the front (B29). When replacing the steering column tube module control unit (N80). When replacing the yaw rate sensor for lateral and longitudinal acceleration (B24/15). With mechanical damage of long range radar sensor at the front (B29). With collision repair in front area, as well as changes to camber, track and caster. With change to vehicle level at front and rear axle.	AD00.00-P-2000-04B
8	Read out fault memory using the diagnostic system and delete
			AD00.00-P-2000-04B
9	Perform calibration with diagnostic system	When replacing long range radar sensor at the front (B29).
			AD00.00-P-2000-04B