2.5TD AU did not pass, opacity too high!

Hellow! Was just at the FOH to HU. As expected did not pass, however, because of other defects than I thought. I had reckoned with heaps of defects on the chassis. However, the examiner ran almost around the car and only criticized Kinkerlitzchen for me. This should not be devalued, but rather that it would not be for a narrow penny to be judged. However, there is a problem: AU did not pass because of too high turbidity values. All 3 tests were canceled. Value e see Appendix Sheet 3. How do I get rid of this? What can it be? My driving method: Tägl. 112km work path, of which 74km motorway, speed between 120 and 140km/h with cruise control. Before the motorway there is a climb (on the way back and forth evenly steep) with not insignificant slope, where I always blow up with full throttle in the 3rd gear (about 1km incline). Otherwise rural road and city highway (Westschnellweg in Hannover). Thank you for your tips Greez Timmee