Remove/install pedestrian protection sensor - AR91.60-P-0950NKA

MODEL 117, 156, 176 with CODE U60 (Active Bonnet (Pedestrian protection))

Shown on model 176 without code 772 (AMG styling package - front spoiler, side skirts and rear apron)

Fig 1: Pedestrian Protection Sensor Remove/Install Components - Shown On Model 176 Without Code 772

Courtesy of MERCEDES-BENZ USA

	General information on the impact absorber		AH88.20-P-1000-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on pedestrian protection sensor		AH91.60-P-0001-01A
	Remove/install
1	Remove front bumper	Model 156 with code U60 (Active Bonnet (Pedestrian protection))	AR88.20-P-2000NKX
1	Remove front bumper	Model 117, 176 with code U60 (Active Bonnet (Pedestrian protection))	AR88.20-P-2000NKB
2	Set down front bumper on a suitable base
3	Remove hose (2) from groove in impact absorber (1)	Ensure that hose (2) is seated correctly in impact absorber (1). Hose (2) must be routed without tension or kinks. Malfunctions can occur otherwise. Position hose (2) as deep as possible in groove of impact absorber (1). Hose (2) must protrude the same amount at left and right at impact absorber (1).
4.1	Remove left and right expansion rivet (3)	Model 117 with code U60 (Active Bonnet (Pedestrian protection)) Model 156 with code U60 (Active Bonnet (Pedestrian protection)) except code 772 (AMG styling package - front spoiler, side skirts and rear apron) except code 773 (AMG exterior carbon trim package) Model 176 with code U60 (Active Bonnet (Pedestrian protection)) except code 772 (AMG styling package - front spoiler, side skirts and rear apron) except code 773 (AMG exterior carbon trim package)
4.2	Remove screws/bolts at left front bumper pedestrian protection sensor (B151/1) and right front bumper pedestrian protection sensor (B151/3)	Model 156, 176 with code 772 (AMG styling package - front spoiler, side skirts and rear apron) with code 773 (AMG exterior carbon trim package) with code U60 (Active Bonnet (Pedestrian protection))
5	Remove left front bumper pedestrian protection sensor (B151/1) and right front bumper pedestrian protection sensor (B151/3) together with hose (2) from bumper	Left front bumper pedestrian protection sensor (B151/1) and right front bumper pedestrian protection sensor (B151/3) must not be disconnected from hose (2). Malfunctions can occur otherwise.
6	Install in the reverse order