yohjo 
2007 BMW 6 Series Coupe 650i 2dr Coupe (4.8L 8cyl 6M)
Severe problems in manual mode
 The 650 has what BMW calls an "inherent characteristic."  If you drive in "manual" shift mode the vehicle is prone to stuttering when coming to a stop.  Imagine your head bobbing back and forth like a doll on the dashboard.  The vehicle is also prone to severe lunges when driving in m1 (such as you might in a parking garage looking for  a spot or while moving forward in a metered freeway on ramp) and to a lesser extent in automatic.  The lunges are dangerous and you must drive defensively at 4 miles per hour.  BMW states the problem is with the  software-it thinks the engine is stalling and the computer gives the engine throttle. BMW won't fix the problem.  Stay away from this vehicle. 