The SIDEMARKER_US value on the 06 Z4 only turns off the middle amber light under the headlights.
PO_ALS_DRL set to nicht_aktiv will turn all three amber lights off as well as the rear side markers.
The ambers still come on when the headlights are on, either on automatic or when switched to on. I'm trying to keep them off all the time.
DAUERFAHRLICHT_US set to nicht_aktiv will disable the lowbeam DRLs and the angel eyes will will still stay on as the DRLs. Or you can remove 838 and 896 from the VO and write to the AKMB and ALSZ.
These are in the ALSZ module.