They are NOT DRLs on your coupe. US coupes come standard with adaptive lights
The inside lights on your coupe are your cornering lights and the appropriate side one will light up when you turn your wheel or put your directional on. They both will also come on when you put your car in reverse. Make sure your lights are in the "auto" position to take full advantage of adaptive lighting.
'16 - 435 x-drive coupe, '14 528x-drive, '07 M6 (I am a sequential BMW hoarder)