Remove/install Parktronic system (PTS) sensors in rear bumper - AR54.65-P-0002RT

MODELS 251 with CODE (220) Parktronic system (PTS) 

Fig 1: Identifying Parktronic System Sensors Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove rear bumper		AR88.20-P-2200RT
2	Disconnect electrical connector (1).
3	Unlock the corresponding circlip (2) using the unlocking tool	Release tool	Fig 2
4	Take outer right rear PTS ultrasonic sensor (B8/7) or inner right rear PTS ultrasonic sensor (B8/8) or inner left rear PTS ultrasonic sensor (B8/9) or outer left rear PTS ultrasonic sensor (B8/10) out of the bumper	Check sealing ring (3) and replace if damaged.
5	Install in the reverse order

Fig 2: Identifying Unlocking Tool (168 589 02 31 00)

Courtesy of MERCEDES-BENZ USA