A6 burning oil smell when switching of engine

[Ash123]

I got an Audi A6  2015 with Electric on/off switch (keyless start) engine stops sometimes in the middle of traffic. Then on restarting and coming to a standstill switching engine off one gets a burning oil/rubber smell. Anyone come across this or any suggestion. 

[Envy]

DPF regeneration. Should not start stop when it is active. You will notice that when the car is cleaning the DPF that the tickover speed is higher - mine sits at 1000 instead of 800 RPM.