Truly a nightmare mate! The same happened to my S3 a couple of years ago. Some guy attempted to park in a space outside my place and made a complete ARSE of it and caved in my offside wing. He then sped off without leaving anything. I never saw it happening, but the guy who lives in the apartment above me seen it all and gave me the make, colour and registration number of the car. It was a burgundy E-Class Mercedes with a private reg. I called the Police and they came round and I basically gave them them this guy on a plate. There's all the info, go and book him. And the outcome?? Absolutely nothing. After about 100 phone calls to the Police they finally admitted that they couldn't find the guy. I'm sorry, but if I give them the make, colour and reg of a car, you'd expect some results!! I ended up paying for the new wing and spray myself. £600. At least you know where this muppet lives. You'd be as well going round and giving him a hiding to get some satisfaction, cos I'd be surprised if you got a result from the Police.