My XF sometimes gives some exhaust fumes in the cabin, not a real diesel smell.
One garage thinks it is leaking at a overpressure pipe of the turbo because of a high backpressure (measured with SSD the pressure difference over the DPF and it is ~70 mbar @ 4000 RPM), which is not that bad imho. To my knowledge a 2.2D has no overpressure pipe on the turbo. It could also be a blocked catalyst.... Do not know how to check that.
The other thinks it is a leakage of the turbo at the seals.
I do not mind spending money but for this amount of money new cat or DPF or turbo it should be right first time.
Anyone ideas?