First of all, welcome to the site!
As for your questions, "Battle of the Bulge, Then and Now," mentions the 2nd Armored (Armoured) being in the vacinity of Erezee, Dochamps, Samree, the large tank battle at the tip of the bulge near Celles, Buissonville, Havrenne, Forzee, and Houffalize. The fighting around Celles on Dec. 24-26 was the first major engagement in the battle for the 2nd AD.
Hope this helps a little!