On youtube is available an interesting footage dated September 16th 1944. This German footage, taken by a SS war reporters in Tondorf, shows the SS-Pz.Abt. 501 (Schwere SS-Panzer-Abteilung 501, former SS-Pz.Abt. 101) passing through the town moving forward to the frontline. It’s the heavy tank battalion attached to Kampfgruppe Peiper.
These are the Tiger II of the 2. Kompanie.
There is a really interesting website devoted to the SS-Pz.Abt 501 during the Ardenne offensive – www.ss501panzer.com
I have built an approximate map of the SS-Pz.Abt 501 route starting from Tondorf till La Gleize:
View Kampfgruppe Peiper in a larger map