Finding hull down positions.

[Der Kuenstler]

The best thing to do is:

1) AVOID using the "seek hulldown" command, which is about as lame as "follow vehicle".
2) approach the enemy armor (which is already under observation by your infantry elsewhere) from behind a crest with your tank unbuttoned and on "hunt" - it will stop when the commander sees the enemy AFV and will be hulldown.
3) If your tank's commander has been killed don't use it anymore to try to fight other tanks. You'll most likely just get it knocked out. Move it where it can safely shell buildings or infantry instead.