No shortcuts. There are several sources of a parasitic drain. you must diagnose it.

Set up a multimeter - I actually use 2 - one for measuring Mili-amps on negative terminal and one to measure mili-volts across fuses.

Get the car in sleep mode with tailgate and glovebox/fuse tray open.
Don't test fuses by pulling them...measure mili-volts across back.

Check my posts if you want to see the process described.

__________________
'99 E39 528i 5-speed 130k
'06 325Cic auto 115k
'05 X5 3.0 auto 173k-SOLD
'03 530i - manual swapped - 430k miles-SOLD