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

MODEL 172.4 with CODE (230) Advanced Parking Guidance 

Fig 1: Identifying Parktronic System Sensors Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove front parking system distance sensors (B8/1, B8/2, B8/3, B8/4, B8/5, B8/6)	See "Disassemble/assemble front bumper".	AR88.20-P-2050W
2	Install in the reverse order