The warning light on the dial turns on (on certain versions together with the message on the display) when the car exceeds the speed limit set previously (see “Reconfigurable multifunction display” in the “Dashboard and controls” section).
See also:
Knee Impact Bolster
The Knee Impact Bolster helps protect the knees of the passenger side front passenger
by positioning the passenger for the best interaction with the Advanced Front Air
Bags.
Along with seat belts ...
Driving style
Starting
Do not warm the engine with the car at a standstill or at idle or high speed:
under these conditions the engine warms up much more slowly, increasing electrical
consumption and emissions ...