Daytime Running Lights
Daytime running lights (DRL) are designed to come on automatically when the engine is started - all other lights should remain off.
The requirement to have DRL only applies to new models of passenger cars and small delivery vans that go through the European whole vehicle type approval process after Febuary 2011.
DRL must be bright enough that they can be seen clearly in daylight and as a result are too bright to be used at night time. DRL should therefore go off automatically when headlights or sidelights are switched on.