The F10 does have DRL (Daytime Running Lights), or at least it has in the rest of Europe...
On the F10 (and other new BMW's), the DRL is the angel eyes (corona rings in BMW speak) that serve as both parking lights and DRL. When in use as DRL they shine brighter than when they are parking lights. Just try to use the light switch and see if you don't have the same feature as well.
The DRL can be switched on/off in the iDrive menu, check if the DRL box is ticked.
Some info on BMW DRL: BMW 1-series DRL
Parking light brightness
And I suggest you change the mesh grilles to the ones from the M550d