140TDI engine cut out

[Carefree69]

So there I was earlier driving to work and at a set of traffic lights no more than 200 yards from work I stopped the car at a red light.

I had the start/stop deactivated but after sitting for 2/3 minutes I went to pull away in 1st gear and noticed that the engine was off. I don't think there was any lights or messages on the dash and when I turned it off from the key and restarted the engine fired up as normal. I drove into work and let the car idle for a few minutes to see if it would cut out and it didn't. I have since sat with the engine on for 5 minutes with no problems.

Any ideas? Could I have coasted to a stop and just stalled, or could it be anything else?

It's a 2010 A3 140 tdi with 44k.

Thanks all.

 

[Carefree69]

Just to add, I'm almost 100% sure I didn't stall it, I think I'd have known and I can't remember the last time I did stall a car.

That tells me mechanical failure maybe, but what?