Touchpad, Component Description - GF54.21-P-4511GW
Model 463 (except 463.342) as of Model year 2019
Location
The touch pad is located on the center console.
Tasks
The touchpad is the central operating unit for different 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
- Receiving 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 (enables quick access to the base functions (navigation, radio, media, telephone and Internet, vehicle) and to the functions saved as "favorites")
When changing from one menu entry to another one, the touchpad provides haptic feedback. This function can be activated and parameterized using the diagnosis tester.
Receiving signals
The touchpad also receives the following signals over the telematics CAN (CAN A):
- Circuit status
- Transport mode status
- Engine running status
- Wake-up signal
- On-board electrical system status
- Terminal 58d
- Mode
- Head unit (A26/17) control signals
Sending signals
The touchpad also sends the following signals over the telematics CAN:
- Status of touchpad
- Status of contact condition
- Status of operating mode
- Longitudinal speed signal
- Radial speed signal
- Angular velocity signal
- Number keypad signal
- "Back" button signal
- Background audio button signal
- Home and Favorites button signal
All operations actuated via the touchpad are acoustically confirmed via the vehicle speaker system.
| Wiring diagram for touch pad | PE82.00-P-2061-97ZHA |