Can anyone help?? My skoda octavia 1.9 tdi dsg 2009 is black smoke on tail pipe got no loss of power but a slite juder when put foot thought may be can shaft but no ratle from engine or may be injectors had service done a month ago changed all filters and oil, flywheel was knocking and had that changed and now this please give me your thoughts on what this could be thanks

Black smoke is generally down to too much fuel for the available air. Either deliberate overfueling, like a yank tractor pull or insufficient oxygen, typically blocked or incorrect/badly fitted airfilter.