Complete power failure / Electronics Issue
I've been having some (electronics) problems with my 2007 328i Cabriolet.
Occasionally the ABS light with (!) comes on in the cluster along with a few other lights and I will lose all sound from the radio, no Aux, no Bluetooth etc.
I took it to the dealer in December to fix and they recode the system.
Yesterday I was driving and the cluster lit up like a Christmas tree again with all the lights mentioned above. I stopped, shut the car off and when I tried turning the car back on, I could not ... TOTAL LOSS OF POWER. Key would not come out of ignition, no lights for hazards etc. I had to get it towed to the dealer, but while the car is on the tow going to dealer (maybe about half hour later and about 500 metres) the headlights came on (remember key was still in ignition). So we stopped and checked what was going it. Tried starting it and it started fine, however, all the electronics (radio, time etc) were 'zeroed' ( _ _ :_ _). It's as if the battery was disconnected or something.
Has anyone experienced this sorta thing or know what could be the issue? Is it just something simple as the battery leads were loose or something? Or am looking at something major?
The good news is it's still under warranty until July.
Thanks in advance.