It is in the manual - but it does not show up on my UK vehicle
Turning Assisted Driving Plus on/off
1. Press the button.
2. "Driver assistance"
3. "Driving"
4. "Assisted Driving"
5. "Assisted Driving Plus"
Assisted Driving Plus is automatically offered
when Assisted Driving is active and all functional
requirements for Assisted Driving Plus are met.
Two green LEDs are illuminated on the steering
wheel.
The indicator light is shown in green in the instrument
cluster.
The system starts to assist the driver with the
vehicle control.
Displays in the instrument cluster
Icon Description
Green indicator light: the system is active.
White indicator light: the system is
ready.
Displays on the steering wheel
The two LEDs above the keypads are illuminated
Green in the same way as the displays in the instrument
cluster: