increased consumption and engine load other than normal

Hello experts at my v50 D5 the consumption from 7.44 to 10.5 is fastened. I determined that after the tank was pumped empty, because I had fuelled petrol instead of diesel. Furthermore, the engine load is higher in the emptyfauf than before: from 15 to over 40 to 55. Even if I stand and switch down the selector lever from D to N to P, the engine load indicator changes from 55 to 45 to 40!!! Emotionally I mean that the car doesn’t pull so correctly anymore, yesterday on the highway I had trouble reaching 200, which went better before. What is broken? Furthermore, the engine before pumping out ran more restlessly than then then then?!!! What is defined as engine load? Which measured values determine it? Can someone tell me what to do? What is to do? Also pay attention to the pictures in the annex. Grusss