thanks all for your kind replies.

i am afraid that i am not able to check the garage camera, even if there is no law restriction, coz I drove all the way from zurich to geneve (ironically to the auto-salon), parked my car in the openair carpark there. i also stopped at two rest stations on the highway on my ride there and back, one time each, for a cup of coffee, the rest time is long enough to commit such a damage, and i don't even remember which rest stations they were.

anyway, as stupid as i am, i completely forgot the self-responsible part, coz i had no such experience before. i think the damage is definitely lower than that amount and not worth reporting. i just worry about the scratch is not repairable. it is not a big deal, but just looks ugly and makes me unhappy...

on the other hand, i have a 'bonus schutz' program in my insurance, which will not increase the premium for any accident. i think it also applies to the parking damage, yeh?

now, what i am more interested in is, in case of a more serious damage in the future, does it seem that we can do nothing about that, but swallowing the bitter pill all by outselves? i mean even the insurance covers something we still need to pay part of it, and there will be some inconvenience and time-waste for repairing a car. i know it is probably always the case in every corner of the world for such a situation, but hopefully it would be OK to get a confirmation from here, thanks.