Without showing the full monty BMW has just released a very solid previewteaser video of the fifth generation BMW M5 sedan internally known as the F10M.br br br Previous reports have mentioned an M5 concept debuting at the Shanghai Auto Show next month. Judging by the depth and frequency of these teaser videos Shanghai is very possible, although it could be mixed signals for the BMW 5-Series New Energy Vehicle coming through. If the M5 is a no show in Shanghai, then the Frankfurt motor show in September is a sure bet.br br br Motivating the M5 is same twin-turbo 4.4-litre V8 found in the BMW X5 M and X6 M. Power output however is expectedly increased to 600 PS (441 kW 592 bhp) over the SAV's 555 PS (547 bhp 408 kW). Channeling the power down to the wheels is a seven-speed DCT dual clutch transmission featuring three shift programs in addition to a fully automatic mode.