My wife drives a 2004 C230K sedan which seems to be identical to my 05. We have the extended warranty and will be taking the car in on Monday for service because earlier today out of no where her car started idling sporadically and sputtering as if it was about to die and the check engine light came on. We've taken the car in to the dealer for every due service usually even slightly before it's due and always use name brand premium gas. The car operates completely normal past idle speed but once the car comes to a stop, it's shake rattle and roll time and starts jerking. Any heads up before Monday? Also, the car's digital readout still says "no malfunction" even with the check engine light on. Thanks in advance guys.