FWIW, my OE 2009 135 HID's do not have that switch.
I swapped my originals for a set of Valeos almost a year ago and still have the pre-LCI originals here in the house. Pulled one out and popped the back cover off. It was easy to identify the mechanism that does the cutoff, and I don't see any way to adjust it beyond what the ecu can control.
After looking at the hardware I'm honestly not sure how it's possible for the cutoff to be controlled by coding. It's a solid bit of metal and only rotates out of the way. The shaft it rides on doesn't seem to have any means of left-right travel, or of changing the step direction that I can see...
Which in no way means I have any idea what I'm talking about....
