'Approved used' car schemes are operated by car manufacturers through their franchised dealership networks.

The schemes underpin a carmaker's reputation for quality and integrity. They also strengthen retail prices by restricting the supply of premium quality used cars to manufacturer-controlled outlets. So it's not surprising that almost all carmakers, from Fiat to Ferrari, have approved used car schemes (although Ferrari call theirs "approved pre-owned" - a nice touch). Biggest players in the approved used game are Ford (Ford Direct) and Vauxhall (Network Q).

Buying an approved used car is the next best thing to being the first owner of a brand new car with full manufacturer's warranty. But it's also usually the next most expensive choice to buying new.

The 'approved' bit of the description means that only cars meeting rigorous manufacturer-approved standards are offered under the schemes. Standards vary from scheme to scheme, so always ask dealers what the precise features of their approved used car schemes are.

Minimum standards for most approved used schemes include a full data check, verified mileage, main dealer service history, a comprehensive pre-sale inspection, and a year's warranty (Mercedes-Benz are confident enough to give an unlimited mileage warranty). Some schemes offer more: breakdown assistance, 'no-quibble' 30-day return and exchange, servicing vouchers and MOT insurance.