how far can you drive bmw without stopping?

it's a fair question, i think. could someone point me in the right
direction?

i'm gonna be moving home for good. it's a 12.5 hour drive (roughly 850
miles). so, i'd like to know if there's a recommended way of handling
the drive.

i have a 1999 323i.

if this has been covered somewhere else already, could you post the
link here please? or you could directly email me:

Thanks.