Hi everyone hope everyone's had a good Christmas and new year.our 61 plate a4 2.0tdi teknik has developed a problem if your driving sensibly or at 30mph it's fine but if your for example pulling out onto a dual carriageway if you accelerate in 3rd then 4th 5th etc it's like the car revs up but isn't moving any faster almost like the clutch is slipping if you don't over accelerate it doesn't do it any ideas what it could be could do without having the expense of a new clutch at this time of year