Audi A4 convertible 2003

[Shinobi]

Hello Audi people,

A friend is looking to buy a A4 convertible 3.0 manual petrol with about 110,000 on the clock. Can anyone provide any buying tips or pointers towards a buying guide? Would I be right in guessing the car would be a B6? Wikipedia is useless in this instance.

Any help greatly appreciated, never dabbled in ze German cars.

Thanks