It depends on the definition of "Battle of the Bulge". It did fight at the "outskirts" of that battle and therefore putting it into the subrange is arguably correct. But at that time, the Tiger I was outdated and had been replaced with the Tiger II. Hence on the Western Front it was not considered a battle tank any more. But we are now talking the very end of 44 and the beginning of 45 and hence everything that had gas, ammunition, a crew and a gun was thrown into battle, including this veteran. This tank is a Funklenk tank and was to be used to control remotely carriers of explosives. It did not work very well.
http://www.achtungpanzer.com/borgward-iv-sdkfz-301.htm