Touchpad/Lower Control Panel, Basic Function - GF54.21-P-2006A

Model all (CAR) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 
• Recording of control signals 
• Haptic operating feedback 
• Acoustic operation feedback 
• Variants 

General 

The touchpad/lower control panel in the center console provides control options for the multimedia system and the driving systems.

Selected functions can he called up directly via the switch panel.

Characters can he entered on the touchpad that can he identified by the handwriting recognition function in the multimedia system.

The touchpad/lower control panel is located on the center console.

Function requirements 

• Circuit 30t ON

Function 

Recording of control signals 

The touch-sensitive surface allows the touchpad to detect the positioin of the finger on the touchpad as well as a press on the touchpad using the capacitive multi-touch sensor system.

The touchpad sends the detected finger coordinates and the detected pressure entries to the multimedia system control system. This then uses any swipe coordinates with one or more fingers as a hasis to convert them into control signals.

The sensitivity setting of the detection takes place through the multimedia system.

In addition to the touch-sensitive surface of the touchpad, further controls are integrated into the lower control panel for the following elements, among others:

• Volume adjustment
• Direct callup the navigation, radio, media, telephone and vehicle functions menu in the multimedia system
• Calling up favorites in the multimedia system
• Transmission mode adjustment
• Activation/deactivation of the parking systems
• User identification using fingerprint sensor (vehicles with code 321 (Biometric user identification - fingerprint))

Haptic operating feedback 

Variations are used by the touchpad as an option to issue haptic feedback as confirmation. The ON/OFF switch function takes place through the multimedia system.

Acoustic operation feedback 

The instrument cluster speaker is used by the touchpad as an option to issue acoustic feedback as confirmation. The ON/OFF switch function takes place through the multimedia system.

Variants 

The touchpad/lower control panel comes in the following variants:

• Touchpad/lower control panel as a complete component part
• Touchpad, left lower control panel and right lower control panel as individual components. The lower control panels are connected to the touchpad via LIN.
• Touchpad and lower control panels as individual components in comhination with the head unit operating unit. The lower control panels are connected to the head unit operating unit via LIN.
• Lower control panel without touchpad

Vehicles with touchpad and head unit operating unit:

The user selects on multimedia system control whether the head unit operating unit or the touchpad should he used as the central control element for the multimedia system.

	Detailed information
	Touchpad/lower control panel, detailed information	Model 213, 238, 257, 290 as of model year 2021 with code 446 (Touchpad only) Model 293 with code 446 (Touchpad only)	GF54.21-P-2500A