1994 BMW 540i Q&A
1994 BMW 540i Question: Brand new battery dies if left for 24 hours. What could be draining the battery?
I would start by checked all the doors and trunk to make sure lights are off. Might have a big short somewhere making battery draw. Would take to a repair shop and they can install a meter to battery and start removing fuses to see what is making draw - Avery Automotive
you have a constant pwr draw, have it ck'd out - globalhelper