Daytime Running Lights [DRL] commonly only illuminate the front lights of a vehicle, and not the rear lights. (See the photograph below.)
Usually, they also do not illuminate the dashboard lights for the speedometer and other instruments and controls. This is intended to alert drivers to the fact that only the DRLs are operating and therefore only the front lights are on, but as most drivers have never been adequately informed about this scenario, many just assume that there is a fault with the dashboard lights and drive on, unaware of the danger they are causing for themselves and others.
According to EuroNCAP: “Today, during our 20th Anniversary celebrations, [we are launching our] Road Map 2025, setting out for the first time the programme’s priorities for the mobility and technological revolution the auto industry is just beginning to experience.