what's the probable main cause of a battery drain overnight on a e46, the battery is in good condition firstly and and the alternator seems to be doing its job, after lots of googling the most common issue seems to be the Final stage resistor not going off when you shut off the car so to check that i have removed fuse 50 to elimiante it to see, last time car was driven was tuesday morn and started ok , came out this morn and could not even get an igntition light. really dont know what else to check now