Very hard to read, bad translator.
This is mainly fuel economy & aerodynamics forum.
More specific diesel forum maybe better, like:
VW Lupo 3L TDI - TDIClub Forums
Google Translate
A Lupo 3L owner from Sweden! - VW TDI forum and Audi TDI forum - myturbodiesel.com
Or maybe someone else can understand your problem better, good luck.