Owned an audi for a week and stressed already. It's a 2.0 tdi a4 first off on initial start up it starts up ruff as in lack of fuel or air for a few a second only then I get a feeling of harsh rocking side to side once revved its goes but as soon as I stop its back I can feel it through the car vibrations that is. It's not misfiring . ??? Secondly when driving and selecting 3rd gear I feel a ruff crush like click on gear stick only pedal feels fine saying that it is jerky gearing up or down or could just be me learning its drive. ? It's done 129000 millage.... any advise is great full ? Thanks