Hi chaps from Hampshire very troubled A4 V6 CVT owner

One word...........HELP!!!

i bought a low mileage A4 cabriolet 3.0 v6 auto yesterday after looking for a suitable one for months!! I love the car, my last audi A4 tdi 130 sport ( remapped with 19's) was great but have donated this to the wife now.

the trouble is I test drove the car on dual carriageways fast and it drove really well, tight and solid.

after driving it home at constant speeds of 30-60 mph the rev counter "blips" ever 20 or so seconds as it is it trying to change gears???

The first change when pulling off it a little jerky as well??? Checked on VCDS and no codes at all! I checked with the previous owner and he had the gearbox fluid and filter changed 400 miles ago.

any ideas?? Any help would be greatly appreciated!!!!