V70 D5 smokes after parking left front and stinks! What is that?

Hello, my V70 D5 Automatik, 185 HP, EZ: 04/2007 has been smoking today for the first time after turning off. I only drove the diesel since spring and did not drive it in winter. Were driving with the car today at 0 degrees about 2 km, parked, and there I looked for 10 seconds clearly smoke, slightly bluish, stinking, front left and also in the wheel box from the front wheel on the driver’s side left, climb up. The engine pussed with a blower or something else. Then it was over. D The engine was never ice cold, but it was not yet at full operating temperature. And it was short distances with stop and go. I don’t have a heater. Can it be the additional heating or something that is so smelling? It was really limited to the area around the front wheel on the left and also very short. And the engine rushed, puffed (or so) a bit after the engine was switched off. When opening the moto, the engine was turned off. rhaube was nothing more to be seen. Was directly in a free workshop ( AUTO FIT ). They have looked. But everything dense, no oil outlet or similar visible. What can that be? Thank you !! Greeting !!