Honestly, controls are totally messed up since 2.4. I already read that manual posted above line by line, did compehend and still I don't get it to work properly. For me it is AT guns and some tanks that require to be run with WASD despite I'm only using arrow keys. So great when your fingers rest on WASD while you sat controls to change ammo with num5 or bring up the gunsight with num0. Not to mention that I accidentally hit E(go figure) instead of the WASD all the time.
When I see an AT gun nowadays, I just turn around and pretend not to have seen it. To the hell with it. And I do only light tanks and vehicles.