My wifes 2006 300 Touring has an intermittent problem that does not register in the error codes. It has been to the dealer and they could not find the problem. The engine feels like it is going to die, kind of stutters and regains a steady idle. It does not seem to havea problem when driving only when stopped at an idle. Very intermittent, we think it may happen when the heater is on (which is most of the time).

 

You may need a "computer flashing".
There seems to be a problem with the 2.7/3.5's where at a low enough speed and turning the wheel will cause the car to stall.
Your Dealer should know this. there is a bullentin out about this.