Hi,
Started up my 2008 A6 2.7tdi today, and the engine started to shake, and thick smoke came from the exhaust.
Also had a whirling noise from the engine bay.
Shaking stopped after a few blips of the throttle.

Turned the car off quickly !

Was very cold this morning, so I checked the coolant header tank and that was still fluid.

Is this all just a symptom of the cold weather???
Got the AA coming out to check it over, as i didn't want to drive it.