Remove/Install Parktronic System (PTS) Sensors In Front Bumper - AR54.65-P-0001FR

Model 257, 290 

with code 235 (Active Parking Assist) 

Shown on removed front bumper on model 257 

Fig 1: Front Parking System Distance Sensors Component Location - Model 257 With Code 235

Courtesy of MERCEDES-BENZ USA

Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove service flap at front fender liner.	When removing front parking system distance sensor (B8/1, B8/6).
2	Remove front bumper.	When removing front parking system distance sensor (B8/2, B8/3, B8/4, B8/5).	AR88.20-P-2000FR
3.1	Remove impact absorber from front bumper.	Model 257, 290 with code 235 (Active Parking Assist) except code U60 (Pedestrian protection - Active hood) When removing front parking system distance sensor (B8/2, B8/3, B8/4, B8/5).
Notice	General information on the impact absorber		AH88.20-P-1000-01A
3.2	Remove front bumper crash sensor together with impact absorber from front bumper.	Model 257, 290 with code 235 (Active Parking Assist) with code U60 (Pedestrian protection - Active hood) When removing front parking system distance sensor (B8/2, B8/3, B8/4, B8/5).
Notice	General information on the impact absorber		AH88.20-P-1000-01A
Notice	Notes on pedestrian protection sensor		AH91.60-P-0001-01A
			AR91.60-P-0950FR
4	Release and disconnect electrical connector (1) at front parking system distance sensor (B8/1, B8/2, B8/3, B8/4, B8/5, B8/6).
5	Release catch hooks of corresponding holder (2) in direction of arrow then remove front parking system distance sensor (B8/1, B8/2, B8/3, B8/4, B8/5, B8/6) from holder (2).
	Information on painting PARKTRONIC system sensors		AH98.00-P-9019-02A
		If the front parking system distance sensor (B8/1, B8/2, B8/3, B8/4, B8/5, B8/6) is replaced, it must be painted in the bumper color. Check relevant seal (3). If there is a problem,
		↓ Replace relevant seal (3).
6	Install in the reverse order.