Yes that's how DRL's work.a friend of mine has one of those new DS3's and it has the drl's installed in the bumper
i think they suit that car but, when you turn the lights on the drls go out an when you turn the lights off they come back on. dont know wether all cars with drls do this though
On the 500 they're on by default but when you switch your headlights on the bulbs step down to 5w from 11w and act as sidelights.