Electrical Problem(s) .. or a ghost??? UPDATE: going to service for 3rd time..

[genemish]

1) So a few days ago, I was driving around the town and all of the sudden the alarm goes off. I had to pull over, "reboot" (engine off, lock, unlock, engine on) and that fixed it. I was alone in the car, i do NOT have key-less entry, there was no way I would press the panic button on the key... would it even work while driving anyway?

2) Yesterday morning, i had the car parked in a public lot in Jersey City, NJ. I locked the car and walked away with the keys (self park lot). I glanced at the car a few times while walking away as there was another X5 parked nearby and I was admiring my 214s vs their 212s.. Last time I looked at the car i was about 150 feet away and everything was ok. When I came back in the evening, all the windows + sunroof were open and there was a VERY faint humming noise coming from the car. WTF??? I ruled out the accidental key pressing theory as I always keep the keys in the jacket pocket where they move around freely and don’t press against anything.. Furthermore, the car took longer than usual to start and it felt like battery was low! Luckily it didn’t rain otherwise I’d be screwed!!

3) Alarm went off last night 2 minutes after I parked the car in the driveway.... this was around 8pm

4) In the middle of last night, I woke up because the alarm went off again! I live in a quiet neighborhood, in a cul-de-sac. I’ve owned 3 X5s , I am well aware of their alarm’ sensitivity level and never had this happen in my driveway before. I went to get the keys and went outside. I have to mention that I have a movement-sensitive flood light on top of my garage door and it was off when I came outside and turned on as I approached the car, thus indicating there was no intrusion attempt. I shut the alarm off by unlocking the car. I also started the engine and it seemed to start ok.

5) In the morning, car appeared ok but I heard that same low humming noise again….and it also took longer than usual to crank and start..

Any ideas what is going on here? I will make an appointment for dealer right away but concerned I’ll get the usual “problem cannot be replicated”..