Can the insurance items be reduced from the report>?

Good day…..I had had a driving accident 4 weeks ago… here the threadhttp://www.motor-talk.de/forum/accident-mich-hats-erwischt-t1832713.html is my damage according to the report gross: 3387.20€ net 2846.39€ so far so good… now the insurance has paid,but have a few things shortened from the report paint material 91.17€ spare parts supplement 115.33€ shipment costs 92.40 reduction on local accounting rates Regional trade union sites 245.6€ so missing 544,50€ then it is still written that the insurance has commissioned a dekra, and now have me an example workshop genant where I can leave my car rep….. so you don’t pay me the bmw calculation rate,but the set of the workshop what they have recommended to me… can the insurance simply shorten? what can I do now many thank you for the answers in advance soner