The 5.SS Wiking didn't had any Tigers, it only had Panther's and Panzer IV's. Change the Tiger in an Panther. It is an small change but it is historical accurate.
Look at the order of battle here:
http://www.wiking-ruf.com/main.html
Wiking -> order of battle
Look at the order of battle here:
http://www.wiking-ruf.com/main.html
Wiking -> order of battle