Ok, I experienced the front brake rotors needing to be replaced and took the car in for the warranty work. The next day I had shuddering engine issues like is being mentioned. When I took the car in they mentioned the exact same 5th cylinder issue and that it was carboned up and needed cleaning. They told me to use better gas...When I got the car back I was driving it around the very next day and the shuddering returned, as well the check engine light started to flash. Took it in and they had to rebuild the top-end including new head gasket. 2 weeks in the shop later I got it back and everything was fixed under warranty which also included cost of rental car. 22000km's and I'm scared to own this thing now...