I was driving down a dual carriageway (70mph) near home. I had set ACC to 62 mph. After a few hundred yards the car accelerated to 70 mph and displayed 70mph on the ACC screen. It also did the same on the return journey on the same stretch of road. Obviously on the other carriageway!! Any ideas?

Now for the confused bit following my previous TSR post. I was travelling down the A43 from the M1; dual carriageway (70mph). I have travelled this road many times with previous Skoda's Amundsen satnav. The satnav displayed 60mph(why?) and when I tried to increase ACC to 70mph it took some doing after getting the message "speed to high" Going back to my previous post about TSR this confirmed my suspicion that TSR only worked from sat nav. It also did the same thing on the return journey. However on the M1 the TSR picked up all of the variable speed limits from the overhead gantries. Thus making me think that the TSR must be working from the camera. No wonder I am confused!! Any ideas on this one, before I take my new car back to the dealer.

I guess the sudden acceleration might have been you nudging the column slightly clockwise, and then speed would go up to 70 the next 'notch' on the scale, doing it both ways does seem odd though - having said that I flash my lights and indicate and all sorts as I'm still not perfect on toggling the correct stalks...

How old is the car?  If it's the facelift, then I think that it has intelligent Adaptive Cruise Control, where it uses the TSR to work out the speed limit and then adjusts the ACC accordingly...I think...I don't know.  Mine's an old boat (but still gorgeous and awesome!).  

Since you're close to this carriageway, just try to disable the *predictive* ACC in the parameters (ie. the fact that the ACC uses the TSR to adapt the speed) and then see if that fixes your issue.