z168, that's a great question. Part of the "convenience" package on my 500E allows the player to turn on when car is off...

bmwpowere36m3: I'm doing this on a 1432, which guts are almost identical to the 780. The Bose system in my 500e is solid...pretty nice quality especially since the amp is new and all speaker are new OE as well (except rear deck). I prefer the bose amp to power everything rather than have the iPod headphone amp pushing into the Bose amp...