Hi guys I have a problem when I use sport mode in SMG When I chage gears HUD turns off for moment of shifting and music cuts off (something like cd skips), I don't know why it can be. Anyone experience that problem? Any comments are welcome, Thanks in advance. p.s. sorry for my bad english

It's probably a weak battery. Let me guess, it happens more while you're using things like the seat heater, steering wheel heater, etc., right?

Check out this thread:
http://forums.e60.net/index.php?showtopic=22150
(it's rather long but still fun to read and watch how we solved the problem... ;) )

Ya I was thinking! Woooo I remember someone having that problem... :)

i had that problem,in my case it was not associated with amount of drain on my battery,rather,it was happening when the outside temperature was dropping to around 50F and lower-so i had no problem in the summertime.I never figured out the exact cause of it,my guess would be "bad" battery.
I also remember that i could reproduce this sudden loss of electrical power by revving up engine while idling(not moving+gearbox in neutral) during which the light in the glovebox would go off for a split second along with muted radio.Hope it helps.