Turn the knurled ring to 
.
The warning light 
on the instrument
cluster will come on.
See also:
Main beam headlights
To change the bulb, remove the protective cover (1), release the catch (A) and
remove the bulb (B). ...
ESC Activation/Malfunction Indicator Light AndESC OFF Indicator Light
The ESC Activation/Malfunction Indicator Light in the instrument cluster will
come on when the ignition switch is turned to the MAR (ACC/ON/RUN) position for
four seconds. If the ESC Activation/ ...
Parking sensors
The parking system detects and informs the driver (through an intermittent acoustic
signal) about the presence of obstacles in the rear part of the car. ...