Was sat in my car stationary today and slowly went through the rev range and between about 1100 to 1800 revs you can feel the 'rhythm' of the engine change it doesn't sound any different as you progressive, nor is there any clunking rattling etc. It is very very hard to notice, it could be just the natural characteristics of the engine and I'm just being paranoid.
Engaging, disengaging the clutch in neutral doesn't have any effect either
Any ideas what it could be? It's a 2.0 tdi S-line Cabriolet 2006 with 69k on the clock
The needle isn't up and down or anything, the revs progress smoothly.
You can only just sort of feel it, the sensation off balance wheel except stationary.