2007 BMW M5 Vehicle Speed Control Problems

I WAS STOPPED AT A RED LIGHT. THE CAR HAD NUMEROUS SAFETY MALFUNCTIONS ON AT THE TIME OF THE INCIDENT. THE I-DRIVE SCREEN PROMPT ADVISED TO DRIVE IN A CAUTIOUS MANNER. WHILE STATIONARY AT THE RED LIGHT THE CARS REV COUNTER WAS BOUNCING UP AND DOWN FROM 500RPM-1500RPM. MY DESTINATION WAS ROUGHLY ONE MILE AWAY. THE LIGHT TURNED GREEN AND I GAVE THE CAR THROTTLE, BUT THERE WAS NO FORWARD MOVEMENT, THE CAR REMAINED STATIONARY (THE REVS ALSO REMAINED BELOW 900RPM). I GAVE THE CAR A BIT MORE THROTTLE ROUGHLY 30% (THE REVS REMAINED BELOW 900RPM AND THEN I TOOK MY FOOT OFF THE THROTTLE), AS I DID THIS THE CAR JUMPED FORWARD AND BUCKED VIOLENTLY WITH THE THROTTLE BEING ULTRA SENSITIVE. I PROCEEDED TO MANUALLY ENGAGE SECOND GEAR AND LUCKILY THE BUCKING MOTION STOPPED. I AM UNSURE IF THE ISSUE IS A SOFTWARE OR MECHANICAL ISSUE. THIS HAS ALSO...