I believe that was the new starter, after they re-released the set with a consistent (and larger) vehicle scale. There has since been several releases for the various theaters, and WotC relased new revised unit stats on PDF as well.
Mot
Bought a set 2 booster today and got the whermacht expert sniper. Now I have a question regarding crackshot: Is I use crackshot on a tank that is allready disrupted can I damage it? And if the tank is allready damaged can I actually destroy it?
Crack Shot gives you +1 to hit, I think you mean Headshot?
An attack from Headshot is NOT a hit, so doesn’t stack with them; all it can do is exactly what is says; give a face-up disrupted counter. This is exactly the same as getting counters from defencive-fire - they don’t count towards the number of hits during the casualty phase.