How much would it cost to repair a back fender of a 05 mercedes sedan if a screw punctured it making a dent?

I hit a mercedes today going about 4 miles per hour and the screw from my licence plate made a small hole in th back fender and around the hole is a dent which is a little smaller than a coaster. Any idea how much that would cost to repair?How much would it cost to repair a back fender of a 05 mercedes sedan if a screw punctured it making a dent?
They're going to come back with some ridiculous quotes under the circumstances.It may be best to let the insurance companies work it out if the figure of $500 or more comes up. Good luck with it.How much would it cost to repair a back fender of a 05 mercedes sedan if a screw punctured it making a dent?
200 -400 dollars depending on wear it is taken