Switching on
The cooler can be operated at two levels.
1. Switch on the ignition.
2. 
Press the button once for
each cooling
level.
The highest cooling power is active when two LEDs are lit.
If the cooler was switched on the last time the ignition was switched on, it will likewise be switched on the next time the ignition is switched on.
See also:
At a glance
These overviews of buttons, switches and
displays are intended to familiarize you with your
vehicle. You will also become quickly acquainted
with the available control concepts and options. ...
The concept
The central locking system becomes active
when the driver's door is closed.
The system simultaneously engages and releases
the locks on the following:
▷ Doors.
▷ Trunk lid.
▷ ...
Switching between upper and lower
case letters
Depending on the menu, you can switch between
entering upper and lower case letters:
...