Auto pilot system (APS) block diagram - GF82.61-P-0001-02GQ

MODEL 164 as of model year 2009 with CODE 511 (Audio 50 APS with DVD changer) with CODE 525 (MB Audio 50 APS radio) 

MODEL 251 as of model year 2009 with CODE 511 (Audio 50 APS with DVD changer) with CODE 525 (MB Audio 50 APS radio) 

Fig 1: Auto Pilot System Block Diagram - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

Shown on model 164.1 

Fig 2: Auto Pilot System Block Diagram - Shown On Model 251

Courtesy of MERCEDES-BENZ USA

Shown on model 251