Car wont start, evrything else works

Bought bmw 528i xdrive about months ago, didnt wanna start, bought new
battery, re-programed , still nothing, took a starter out, tested and didnt work,
bought used one , put it in and started on first try.
Drove car arpund for and hour or so, everythig was fine, no codes.
Left it in garage for a week, took it out on weekend amnd started , got it
washed ,went for drive, and died on me couple blocks away, wont start,
checked everything agin, fuses, all lights come on and nothing.
Anyway looks like that battery is getting drained fast, sound like starter cliks
but its solemoid i think, with fully charged battery tries to turn over and nothing
happens, so beside battery and another code for 801c20 ZGM;central fault
memory full-no- controll-unit fault  , no other codes.

Any ides guys?