New to this, new to BMW's. The car is registered here as a 535 yet has M5 badges and appears to have some M5 features. Had it inspected today and the authorities say that they can see no obvious signs of modification.

I would like to know what I have, is it an early M5 or 535. I will post pics if someone can tell me what to take pictures of or look for. It may have been 'mis registered' or had some mods done that were done well in the past.