2008 A3 3.2 shuts off when I come to a stop
 

This is sudden and inconsistent. After driving in dry temperate conditions today for about 40 miles, I had to slow to a crawl for traffic and it just shut off. No warning lights or errors. I can put it in park and restart it, No issues driving at speed. I had to continue 60 miles and when I had to stop for a signal or for traffic, it happened a few times but not most of the time. Still very nerve wracking in rush hour in 4 lanes of stop and go at night.. Regular idle is around 800 per the gauge but when this happens it drops to about 400 and then just cuts off. I am in a rural area now 75 miles from service center. Any help much appreciated.!