I have a 2015 plus 4 GDI and had similar problems a few weeks after purchase.
Turn the key- nothing happens, return the key to the off position and try again and it fires up no problem. Also there have been times when you start it up, it coughs and splutters, so rapidly pump the accelerator pedal for about 5 seconds to get it going and it just struggles to run. Turn it off, start it up again and it runs fine.
This only ever happens when the engine is hot and it has been stood for a few minutes. At the 1000 mile service the dealer could find no fault, but it has not done it for a few months now- Newness!!!
First post and loving the car- been following the forum for some time now; interesting with some real enthusiasts and a vast amount of knowledge out there. I usully log on and read articles for my daily fix...
