06 550i Intermittent Engine Shutter/Rough Idle

When I first start my car in the morning it idles a little rough, but not terrible. But when I drive the car for 5 - 10 minutes, shut it off and start it up 5- 10 minutes later (after I stop for coffee), the engine violently shutters. This only happens when the car is cold. The only way I can get...

iphone verizon wireless backup assistant promotion code verizon wireless backup assistant promo