Dismissal and loss of use in the event of an accident without fault

Good evening, I would have a question about the procedure, if you want to assert a usage failure. In short: Someone hit us in a parking lot. He is 100% guilty. Workshop has looked at the damage, is about larger paint damage. Costs were estimated at approx. 1000 euros. Opponential insurance accepted this and noded without further asking an expert. My first question would be: Is it ‘normal’ that in such a case the damage to the Are there any disadvantages in ceasing the damage as an undeclared injured person? My second question would be: according to the workshop, the repair will take about 3 days. Can I claim a loss of use for this time? If so, how does that relate to the assignment of the damage? Am I correctly assuming that I have to handle this myself with the insurance? How best to do this: write a letter saying that you have to cancel the workshop? Failure to use the car and how long was the car in the workshop? Should I address the table and classification etc. myself, i.e. set a sum or let it be determined by the insurance company? Thank you very much and many greetings