@Vlodek Your car was most probably remapped/tuned with a modified ECM software that has DPF and EGR mapped out/disabled. Ask the former owner of the car, if that is possible, what exactly was done. You can try to get back to stock software (stage 0) via the "engine optimization" option in vdash. But this will cost you money. And if the EGR was blanked and the DPF emptied, you will run into serious problems and costs afterwards.
What exactly are your problems/ error codes? Why do you want to do a DPF regen?
And please write in english.