Personally, I'd just ring one of the local ads in the paper that collects scrap cars, and they pay you for it, that way, there's no trace of you or anyone touching the car, or if you can, ring vosa up, state that a car has been abandoned outside your house and hasn't moved in so and so days, they'll take it away too. Depends how far you wanna go really, thankfully I don't live in such an area. Good option is to burn it out lol. Damien