Touchpad, Component Description - GF54.21-P-4511GN

MODEL 166 as of model year 2016 with CODE 531 (COMAND APS)

MODEL 292 with CODE 531 (COMAND APS)

Shown on model 292

Fig 1: Identifying Touchpad Components - Shown On Model 292

Courtesy of MERCEDES-BENZ USA

Location

The touch pad is located on the center console.

Tasks

The touch pad acts as a central control for the telematics functions. The touchpad can be used to operate the functions shown on the Audio/COMAND display (A40/8). To this end, the touch pad fulfills the following tasks:

Touch-sensitive registration of control signals
Receive signals
Sending signals

Touch-sensitive registration of control signals

The user input (operating gestures, including pressing, and handwriting recognition) is detected by the touch-sensitive user interface and the palm rest is recognized. In addition, the touch pad detects when the following integrated buttons are pressed:

"Back" button
Background Audio button (enables operation of the audio source without leaving the current menu)
Home and Favorites button

Receive signals

The touch pad receives the following signals:

Terminal 30g and terminal 31 via a direct line
CAN messages (control signals) via telematics CAN (CAN A)

Sending signals

The touch pad sends the control signals via telematics CAN to the COMAND controller unit (A40/3).

Body

The touch pad features a touch-sensitive operating surface and three integrated buttons.

Wiring diagram for touch pad

PE82.00-P-2061-97NBA