A slightly longer body and a stretched wheelbase give more interior roomThe C-class is also wider, to improve lateral stretching space C-class uses newly developed seats Front seat has power adjustment for cushion height and backrest angle only Avantgarde seats are trimmed in leather The Avantgarde is fitted with a seven-speaker sound system Individual settings in the climate control system are saved in the electronic ignition key The C-class is optionally available with satellite navigation The Avantgarde C-class comes with larger, 7Jx16 alloy wheels Tyres are 205/55R16 A split-fold rear seat, with fold-up rear seat cushions, aids luggage-carrying versatility The boot carries 455 litres of luggage Controls for the split-fold rear seat are located in the boot All windows and the sunroof can be closed by pressing the air recirculation control Engine oil level can be monitored via a control on the steering wheel Window bags extending from A to C-pillar deploy to protect from head injuries in a side impact Side airbags are fitted to all four doors Front airbag deployment is controlled according to the severity of a collision The 3.2-litre C320 engine produces 160kW at 5700rpm and 310Nm at 3000rpm A new, three-link MacPherson strut system was developed for the front Rear suspension is an upgraded version of the multilink system used in the previous C-class All C-class models have the Mercedes ESP stability control programme The C320 model is available only with five-speed automatic transmission Four-channel anti-lock braking with electronic brake force distribution is standard on the C-class The braking system is enhanced by "brake assist" which boosts maximum brake pressure in an emergency to shorten the braking distance Rack and pinion replaces the recirculating ball system used on the previous C-class