How can I get a discount on a BMW X3 or X5 when buying from overseas?

I am looking to buy a used (57/08) BMW X3 or X5. A slight complication is that I am trying to do this from abroad so I can pick the car up shortly after my return to the UK. This mitigates in favour of...

Spaghetti Carbonerror?

I own a two-year-old BMW X3 3.0 Diesel Automatic. The 'birth certificate' for this car states it has CO2 emissions of 226g/km, which just puts it into the £405 tax band. Several websites quote a much lower...