Nah, I don't think it's the norm to have that stuff happen, but you never know. I was just making the suggestions cause I always tend to look for simple problems first. I wasn't saying that these kind of things normally happen, but you have a few days before you have to go to the shop, so why not spend a couple of minutes checking things over? Can't hurt. It's too difficult to give you an idea of what might be wrong with your car without knowing where you've driven it, how you've driven it, what the rough idle sounds like, which light is on, what kind of gas you're using, whether or not you're chipped, if you have an aftermarket intake, etc, etc. I haven't heard of many people having this kind of problem, especially in such a new GTI, unless they've installed aftermarket parts that mess with the sensors or ECM in some way. Your dealership will know what to do. Sorry if that wasn't much help, hopefully someone who's had this same problem can reply with a good answer.