I bought the cable on eBay and downloaded NCS Expert.
These parameters both disable monitoring if you switch to LEDs. They are labeled hot/cold monitoring of high beams, but xenons don't have separate high beam bulbs, so no explanation for that description. Maybe it's for halogen.
warmueberwachung_FL nicht_aktiv
kaltueberwachung_FL nicht_aktiv
This parameter turns on angel eyes as DRLs.
GED_FL_ALS_DRL aktiv
I tried several LEDs and found these to work best. My xenons are 5000K Morimoto bulbs, and these are slightly more blue, but much closer than the original halogen angel eye bulbs.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1