My lovely wrench light appears when I'm idling. It's happened three times in the last two weeks. An example: I'll be sitting in line for a car wash, the wrench light comes on and my car begins to violently shake. I'll turn it off, restart, and it takes several turns of the engine to restart. I've had the car for less than two years, about 15,000 miles. I baby this car, I love this car. Right now, it's at the dealers. As I post this, I have confidence in my dealer and will post the results of today's visit. My only annoyance is, I called on Friday and was told I may be without a car for the whole weekend. I'm under warranty, why wasn't I offered a loaner (I'm single and all my friends work) so I could take it in when the problem started?