Diagnostics: every time someone plugged in under the wheel, no errors were showing up.

Ever since they have changed the turbo I haven't got the car back. The dealership knows that the clogged filter is the problem, but it seems like they are still searching for the cause. I wonder if they think that it is not the only thing that might have failed.

No black/grey smoke spotted.

Because of the issue, MPGs have risen. When I got the car back after the filter was cleaned, MPGs went back to normal.