Head-up display for Distance Warning[1]
In cars equipped with head up display*, a symbol is shown on the windscreen for as long as the time interval to the vehicle ahead is shorter than the preset value.
However, this presupposes that the Show Driver Support function is activated via settings in the car's menu system; see the section "Head up display" for how this works.
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windscreen difficult to recognise.Note