Noise from engine after ignition off
I recently (about a month ago) took delivery of the Audi A4 B8 2.7T CVT. It's been a great drive so far.
Just this evening, after driving home from work, I switched the engine off and took the key from the ignition. Stepping out of the car, I could still hear a noise from the engine bay - sort of like a fan-type sound. The sound went off after about 5 or more minutes.
I'm not worried too much, but wonder why this is so. I did push it a bit hard just before getting home, and that made me think of the older (non-Audi) modified cars that my friends used to have that had a turbo timer. But I didn't think 'normal' cars would have that feature.
Can anyone out there shed some light on this?
Thanks & regards