[Brian61]

1) Use artillery and/or heavy weapons to suppress and button up the enemy tanks.
2) Destroy all the lighter tanks first.
3) Isolate each heavy tank using smoke and terrain.
4) Mass panzer fire at the heavies, at least 5:1 but more is better. While the german guns may not destroy, they are likely to damage the target.
5) If necessary (crew doesn't abandon or tank is not mobility killed), move a JPz I or a 4.7cm ATG to within 300m and fire into the weakest face (usually rear).
6) All else fails, close assault with troops having grenade bundles or, preferably, engineers with flame throwers or satchel charges.

Hope this helps,
Brian