See also:

Activating HDC
Press the button; the LED above the button lights up. ...

Resuming cruising speed
Press button 4: The stored speed is resumed and maintained ...

Playing a supporting role: innovative new 8-speed automatic transmission.
All new BMW 5-Series models will feature an 8-speed automatic transmission, which brings smooth shifting, sportiness and efficiency to new levels of perfection. Compared to the exemplary 6-speed a ...