Strange one this, but becoming more frequent... When I'm driving on the Motorway and I momentarily back off the throttle at just over 80 MPH then press the accelerator again, it feels like the engine cuts out for a split second, resulting in a slight (say 200-300) drop in RPM. I have a 7 week old Sportback 2.0TDi. Should I be worried, or have any of you expericenced the same thing? Answers gratefully received.