Parktronic system (PTS), block diagram - GF54.65-P-0001-01A

Models 140, 202, 208, 210 with code 220a Parktronic system (PTS) 

A44/1 deleted in model 210 as of 1.7.99 and integrated into A44/4

Fig 1: Parktronic System (PTS) - Block Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.