Hi there,

It’ll depend on the service history, the price (which ought to be suitably low) and the way it drives – any sign of white or blue smoke from the exhaust, and you probably want to walk briskly away as the turbo is likely about to blow. Similarly, if there’s a load of black smoke under hard acceleration, that could speak of further issues with the diesel particulate filter. It’s a risk, but if it seems solid and has an impeccable history, you can try this 520d out.