Well the day started fine, no issues, car started and Sync3 all good, I reset the Tyre pressure monitor. Until I drove 40 minutes away in 32 degree outside temp with AC on, then thud and stalled again. Key open close reset and off we went for about 200 metres, then thud and stalled. Pushing the starter button only seems to just engage the starter motor but wont turn the engine. So RACV called and got it towed to the dealer. Now awaiting the diagnosis.
It seems the extra heat in the engine bay is causing something to cut out. My tip is the Battery. Once I pop the bonnet and wait for 30 minutes it starts like normal. Car is only 3 weeks old but I dont know if they are shipped with a battery or they are fitted here.