Hey Cookie, first of all thank you for your post!
I'm not 100% sure what you mean to be honest.
As far as i know there is no tank in adlernest that breaks a wall?
The objective in adlernest is to secure the gold to the transmitter, the transmitter is behind a wall that can be exploided by arming the controls in the "depot section"
I'm not sure you mean that 'wall from the depot section"? or is it the wall that can be opened from inside with the bar handle?