[Perendinate]

Hi yall,

I've been chasing a battery drain and corresponding ccid-415 on my 09 328xi for a while now. I noticed that the car seems to lose voltage overnight (0.1-0.3v) and I've been getting a ccid-415 error. I did a parasitic drain test by looking for voltage drop against the fuses but came up with no results. I was walking past my car tonight and heard the fuel pump randomly prime, despite the car not being driven today. When it primed I did not have my keys, nor did I interact with the car in any way.

Could this be the cause of my parasitic drain and if so any ideas as to what could be causing the fuel pump to prime randomly?

Thanks