Touchpad, component description - GF54.21-P-4511RF
Model 205 as of 6/1/15 as of model year 2016 with code 448 (Touchpad)
Model 205 up to 5/31/15 up to model year 2016 with code 522 (Audio 20 radio)
Model 205 up to 5/31/15 up to model year 2016 with code 531 (COMAND APS)
Model 205 with code 494 (US version)
Model 205 with code 498 (Japanese version)
Model 253 with code 448 (Touchpad)
Shown on model 253.9 with code 430 (Off-road package) and automatic transmission, valid for model 205 (except off-road operating panel) as of 01.06.2015
Shown on model 205.0 up to 31.05.2015
Location
The touch pad is located on the center console.
Tasks
The touch pad acts as a central control for the telematics functions. The touch pad 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 touch-sensitive surface records the entries made by the user (operating gestures and handwriting recognition) and the hand print is detected. In addition, the touch pad detects when the following integrated buttons are pressed:
- "Back" button
- Background audio button (enables the operation of the audio source without leaving the current menu).
- Home and Favorites button (enables quick access to the base functions (navigation, radio, media, telephone and Internet, vehicle) and to the functions saved as "Favorites").
Receive signals
The touch pad receives the following signals:
- Circuit 30g and circuit 31 via a direct line
- CAN messages via telematics CAN (CAN A)
Sending signals
The touchpad sends the control signals over the telematics CAN to the head unit (A26/17).
Design
The touch pad features a touch-sensitive operating surface and three integrated buttons.
| Wiring diagram for touch pad | PE82.00-P-2061-97FBA |