We just purchased a very nice Audi A2 1.6 fsi but noticed some grey smoke coming from underneath the car whilst driving it back (not from the exhaust pipe but from the front middle underneath of the car). We took it to the garage and they couldn't find a fault (exhaust compression was okay). Though one thing they noticed is that the car had quite a bit of pressure on the coolant container and they guessed the car was using a bit of coolant. However, in the engine bay, no visible leaks were detected and underneath the car is dry. It actually looked that quite a few parts around the coolant pipes were replaced recently. In general, this car has been looked after pretty well with an almost full Audi history.
Still, it doesn't look right that smoke is coming from underneath. I have a link to two videos, one from the outside (https://drive.google.com/file/d/1Wa2mPiSeAtz51_Y6c8gmjVLD0dbweFco/view?usp=sharing) and one from underneath whilst stationary (https://drive.google.com/file/d/1e3QKhBREbvShXfIhR0X182CSQxM0zB_o/view?usp=sharing).
Whilst stationary very clearly you could see the smoke coming from what I thought is the catalyser, see the picture below (with the red highlight where the smoke seems to come from). You can also smell it when you step out of the car.
Does anyone on here have any suggestions/ideas about what this could be? Thank you so much in advance.
Still, it doesn't look right that smoke is coming from underneath. I have a link to two videos, one from the outside (https://drive.google.com/file/d/1Wa2mPiSeAtz51_Y6c8gmjVLD0dbweFco/view?usp=sharing) and one from underneath whilst stationary (https://drive.google.com/file/d/1e3QKhBREbvShXfIhR0X182CSQxM0zB_o/view?usp=sharing).
Whilst stationary very clearly you could see the smoke coming from what I thought is the catalyser, see the picture below (with the red highlight where the smoke seems to come from). You can also smell it when you step out of the car.
Does anyone on here have any suggestions/ideas about what this could be? Thank you so much in advance.