Help.Today without warning,I was at at 50 mph

and developed sudden power loss with speed

dropping to about 20 mph. DSC,DBS,take off

assist and engine malfxn warning indicators

all lit up on the screen. The engine beat VERY

roughly. I shut down,restarted then took off

without problems. Warning indicators were off.

Then it happened again two more times. My ride

is a 2008 550i sport w/ 3000 mi. Any suggestions?

Thanks