Do the 2 adjusting screws adjust the DTRLs, just the Xenons or both?

 

Your drl's are your highbeams in a gen1 mini with xenons...
lowbeams are xenons, highs are halogen bulb run at lower powerfor drl's.
xenon equipped cars have a self adjusting featilure to compensate for car loading....but the basic aiming should be conventional (screws)....meaning the entire assembly is adjusted, changing the aiming of both.

 

There is a long necked stalk style BMW tool which is passed thru the fender well when bonnet is down for adjusting the HD lights while front of the MINI is facing a flat surface.

If you just pop the bonnet with low beams on, you can acess the screw while watching the ceiling of your garage, adjusting can be accomplished same manner w/o the tool.

 

So if use the adjusting screws to set the DTRLs, I won't screw up the Xenons. Good to know.

Not like i'm going to be adjusting my headlights every week to justify the expense of nifty cable adjuster tool.

 

Both will change... not sure how much self-adjustment the Xenons have