Today I finally had the opportunity to demand my D5 a little bit on the BAB. The BAB was completely free and I had set the cruise control to 180 km/h. After a short time the car accelerated abruptly to 190 km/h. I then switched off the cruise control to manually give gas. Suddenly I had no more power, the speed fell back to 160 km/h. After that I had no way of reaching higher speed ranges due to traffic. From the feeling I would say that too little fuel was injected. I tap on the diesel filter. Does anyone have a better idea? By the way, I had no error message and in the subsequent sliding operation I could not notice anything unusual. I was curious what you say. A nice evening wishes Max