Audi A5 Convertbile 2.0 tdi s-line clutch problem ?

Hi i have an Audi a5 convertible 2.0 tdi sline 170 bhp 59 reg in ibis white.
when i accelerate at low speeds the clutch judders and vibrates and its quite jerky.
can somebody please help ?
Thanks

yes, i have posted another thread since this one and i posted how it was kind of resolved, Audi took it for a software update, it has stopped most of the shuddering but still there is abit of clutch shudder whenn cold and accelerating, if there is a problem in the future with the clutch or something they will have to repair because i will show them the details of the car going back previously for clutch judder.