Remove/install Parktronic system (PTS) sensors in front bumper - AR54.65-P-0001GZ

MODEL 164 with CODE (220) Parktronic system (PTS) 

Fig 1: Identifying Front Bumper Parktronic System Sensors Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove front bumper		AR88.20-P-2000GZ
2	Disconnect electrical connector (1)
3	Unlock corresponding retaining ring (2) using unlocking tool
4	Remove outer left front PTS ultrasonic sensor (B8/1) or center left front PTS ultrasonic sensor (B8/2) or inner left front PTS ultrasonic sensor (B8/3) or inner right front PTS ultrasonic sensor (B8/4) or center right front PTS ultrasonic sensor (B8/5) or outer right front PTS ultrasonic sensor (B8/6) from bumper	Check seal (3) and replace if damaged.
5	Install in the reverse order