Glad about the HID thing, dangerous isn't the word, some mk4's did have ECL light even on earlier models depending on which tacho it got, plus with vagcom you can run a test that lights all lights on and tests the revs and speedo upto 160mph to make sure the cluster is fully working.
Also very useful to take a picture at the needle at160mph when running a test a claim your 1.4 made it there