Some time ago noticed quite a rough idle on my MK5 Jetta TDI. Decided to run some measuring blocks with VCDS but I'm not sure how to interpret them. Just to be on the same page, about 2 years ago DPF has been deleted. EGR system is still there. When I push it hard you can see some smoke but I think it's normal. Another think I've noticed is kind of nitrogen smell just after cold engine start. The smell disappears quickly after a minute or so. Any ideas to solve this puzzle?? Attached are two screenshots from VCDS. Thanks so much for your input. pzmaria.