Not that bad. Im starting on 3d in the couple of weeks.
The front needs to be a bit longer.
Dont know if you know this but:
A friend of mine who is an avid 3dmaxer uses a picture from what hes making in the background and he simply layers over it. So just get a picture from the audi from the side and there you have it. Get the depth dimensions from there website or a showroom and build the rest