Running costs were particularly favourable, particularly insurance premiums, while the amount of space and storage was a highlight in the cabin.3=: BMW 3 SeriesVehicle owner satisfaction score: 80.6% Overall ranking: 20th= Pipped at the post by the X-type, and tied with the Mercedes C-Class, the 3 Series put in a solid performance across the board, although problems with the heating and air-condit