I have moved on from considering newer RS7 because of all the problems reported with the 48v belt starter generator (BSG) which on that car charges the regular 12v battery. Tons of failures leaving many drivers stranded. I am now considering SQ7, SQ8. BMW X5 m60i and Porsche Cayenne. Does the SQ7 and SQ8 use the BSG or is its 48v system only used for suspension? I have looked online and watched videos and I am not clear. Porsche forum claims the Cayenne GTS 4.0TT does not used BSG but it is also down on power and wondering if that is just turbo boost or also due to missing BSG. This vehicle will be daily for my wife and our road trip car and we value power and handling but don't want to stress out over getting stranded.