Lennon,
Thanks for checking this out.
I only heard a rumor that it would be possible to enter the tank.
But I had my reservations with this as they - tourists and youngsters - might use the tank as a public garbage can (if you look into a barrel of one of the canons or look inside a bunker in the Ardennes, you'll know what I am talking about 
).
Btw, I noticed that that tank got knocked out the same day Sgt. Homan K Jackson got KIA.
He was with the 53rd Armored Infantry Battalion - 4th Armored Division.
He probably was killed when an assault of the 4th Armored to widen the Bastogne corridor collided with an assault of elements of the infamous 1st SS Panzerdivision on December 30, 1944.
I adopted his grave which is at the Henri-Chapelle Cemetery, Belgium.
Erwin