How can I find a car's build date?

I am going to see a new Audi A6 which at the moment is being stored at the garage with its wrappers on. The salesperson says it has only been in storage for two weeks. Firstly should I worry about how...

How can I find out the build date of my classic car?

My MGB Roadster was registered in August 1979 and is about to be tax-exempt, dependant on its date of build. How do I obtain the build date?

I want to claim road tax exemption on my Ford Capri - how do I find the build date for proof?

I need to prove the build date of my Ford Capri so I can claim road tax exemption. Unfortunately, unlike British Leyland products - there doesn't seem any obvious way to do this. Can you suggest any way...