I have had a very similar issue too this last week on my 2014 1.7 cdti (cutting out when leaving a junction and getting into 2nd gear) the garage have replaced the fuel control valve (under the lifetime warranty) and reset / reprogrammed the fuel system and car seems to be working fine now. Performance had gone down when I received the car back but after contacting the garage about this they said it was the car just rerunning systems and learning itself again, I thought this may be a lie but today after driving about the car looks to be back to normal. Hope this helps...Hi did anyone have a definitive solution to this? The stall cut out at roundabouts I was able to solve by disabling the auto stop by leaving the heated screen on. 1.7 diesel cdti. However the cut out at speed is happening to us. As with some others it started post a service and also tied in with an emissions system sensor warning. At times the car will just shut down whilst driving. The sensor can be an issue or thirdly the car would almost be like it was an old style petrol car that was being over choked when starting it. You'd have to switch it off and leave it and then start it a 5 mins later. Any thoughts anyone?