The Distance Warning function can assist the driver to notice that the time interval to the vehicle ahead may be too short. This requires the car to be equipped with a head-up display* to be able to display Distance Warning.
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 assumes that the Show Driver Support function is activated via the settings in the car's menu system.
Distance warning is active at speeds above 30 km/h (20 mph) and only reacts to the vehicle ahead travelling in the same direction. No distance information is provided for oncoming, slow or stationary vehicles.
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.
Distance warning is deactivated during the time the adaptive cruise control (ACC2) or Pilot Assist is active.
Distance warning only reacts if the time window to the vehicle ahead is shorter than the preset value – the speed of the driver's vehicle is not affected.