I have an '06 E60 M5 which has the Active Backrests... kinda cool. Problem is when I turn the AB's on they work fine on the passenger seat, but on the driver seat turn themselves off after the fits time they "kick in" on a left hand bend (i.e. right hand bolsters fire). The system is fiNe for multiple right bends until you take a left. Again, driver only, passenger system is OK. Kinda smacks of an electrical 'short' of some sort in the right hand side of the drivers seat. Anyone else come across this issue?