Liability in case of convenience car accident

Hello you experts, I would have asked a question and that happened to me about 2 months ago with the car of a friend an accident. When from parking I came against a house wall, it is only a property damage on the car and not on the wall. The car was a MAZDA 323 Bj. 91 worth according to Autoscout24 1300 €. The thing came about so we were with friends and all except I drank alcohol. When the supplies were used up my friend got the idea that we were going to the gas station and d buy new ones. Since you don’t get alcohol after 22h without a car at the tank, so one had to drive. I was the only one who could drive and I also agreed to it. I was provided the car by my friend and no conditions for use were laid up and then the misfortune happened. Since I knew that my private liability will not take over the damage and otherwise also no insurance. The cost estimate was 3000€. So an economic total damage. Well, I’ve got my friend Atoned that I’m going to repair the car, however, I’m private with the help of an acquaintance of the car masters and owns a paint shop or pay 500€ compensation. Well, the proposal didn’t come so well and he just insisted on 1500€ but that’s still too much I find at a moment worth 130€. I now have the fear that he wants to go to court. Now my question looks like I am liable for damages at all because I have not acted intentionally or grossly negligently and out of a favor. How are his chances of getting compensation from me. I know that I am only obliged if at all the currently worth minus residual value to reimburse. Greeting and thank you already