Display in the instrument cluster
The collision warning can be issued in the instrument cluster, in the Head-up Display, and acoustically.
Warning stages

Adapting your speed and driving
style
The display does not relieve the driver of the responsibility to adapt his or her driving speed and style to the traffic conditions.
See also:
Head-Up Display with full-colour capability
The new-generation Head-Up Display delivers even greater display quality,
functionality and flexibility. The symbols projected onto the windscreen are
displayed in sharp resolution in the driver's ...
Sound output
Switching on/off
When the ignition is switched off: press ON/OFF
button on the radio.
Muting
When the ignition is switched on or the engine
is running: press the ON/OFF button on the
radio. ...
Braking: One Step Up, Two Back
There is an aspect of the 5 Series that we do object to, though, and that's
the braking. To be clear, the car stops well enough; it's not a safety concern.
The problem is the feel of the braking, ...
