Touchpad, Component Description - GF54.21-P-4511RF
Model 205 as of Model year 2016 with code 448 (Touchpad)
Model 205 as of Model year 2019 with code 446 (Touchpad only)
Model 205 up to Model year 2016 with code 522 (Audio 20 radio)
Model 205 up to Model year 2016 with code 531 (COMAND® APS)
Model 205 up to Model year 2019 with code 494 (US version)
Model 205 up to Model year 2019 with code 498 (Japanese version)
Model 253 (except 253.99) as of Model year 2020 with code 446 (Touchpad only)
Model 253 (except 253.99) with code 448 (Touchpad)
Model 253.99 with code 446 (Touchpad only)
Shown with code 448 (Touchpad) and code U78 (AMG Sport exhaust system) from 01.06.2016
Shown on Model 253.9 with code 430 (Off-road package) and automatic transmission, valid for Model 205 (except off-road control panel (S70)) as of 01.06.2015 up to 31.05.2016
Shown on Model 205.0 up to 31.05.2015
Shown on Model 205 as of Model year 2019, 253.99 with code 446 (Touchpad only)
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")
Model 205
as of Model year 2018
with code 448 (Touchpad)
Model 205
as of Model year 2019 with code 446 (Touchpad only)
Model 253 (except 253.99) with code 448 (Touchpad)
Model 253.99
with code 446 (Touchpad only)
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 receives signals via the following connections:
- UBF-LIN (LIN A3) (with code 446 (Touchpad only))
- Telematics CAN (CAN A)
UBF-LIN (with code 446 (Touchpad only))
The touchpad reads the control signals of the following components via UBF-LIN:
- Upper control panel control unit (N72/1)
- Left lower control panel (N72/4)
- Right lower control panel (N72/5)
Telematics CAN
The touchpad also receives the following signals over the telematics CAN:
- Wake-up signal
- On-board electrical system status
- Terminal status of terminal 15
- Engine running status
- Terminal 58d
- Control signals of head unit
Sending signals
The touchpad transmits its own control signals as well as the control signals of the lower control panels and upper control panel control unit via the telematics CAN to the head unit.
The touchpad transmits the request to display the status of the functions operated using the buttons on the lower control panels and on the upper control panel control unit via UBF-LIN to the lower control panels and to the upper control panel control unit.
Model 205
as of Model year 2018
with code 448 (Touchpad)
Model 205
as of Model year 2019
with code 446 (Touchpad only)
Model 253 (except 253.99)
with code 448 (Touchpad)
Model 253.99
with code 446 (Touchpad only)
All operations actuated via the touchpad are acoustically confirmed via the vehicle speaker system.
Variants
The design and size of the touchpad varies depending on equipment installed. The smaller variant with code 448 (Touchpad) is installed together with the Audio/COMAND® control panel (A40/9). With the larger variant with code 446 (Touchpad only), no Audio/COMAND® control panel is installed.
| Wiring diagram for touch pad | Model 205 up to Model year 2016 with code 522 (Audio 20 radio) Model 205 up to Model year 2016 with code 531 (COMAND® APS) Model 205 up to Model year 2019 with code 494 (US version) Model 205 up to Model year 2019 with code 498 (Japanese version) Model 253 (except 253.99) with code 448 (Touchpad) | PE82.00-P-2061-97FBA | |
| Model 205 as of Model year 2019 with code 446 (Touchpad only) | PE82.00-P-2061-97FBB | ||
| Model 205 as of Model year 2016 with code 448 (Touchpad) | PE82.00-P-2061-97FBC | ||
| Model 253 (except 253.99) as of Model year 2020 with code 446 (Touchpad only) Model 253.99 with code 446 (Touchpad only) | PE82.00-P-2061-97FCA |