The 3 Series convertible uses the same panels as the coupe versions from the windscreen forwardA glass rear window finally makes on appearance on the new 3 Series convertible The double-layer fabric roof opens or closes in 25 seconds The convertible uses contoured BMW "sport" seats The convertible is not fitted with the TV provided in sedan and coupe models The convertible's sound system includes a six-disc CD stacker in the bootAn on-board computer is standard in the 330i convertibleThe 330i convertible is fitted with standard climate control air-conditioning BMW?s satellite navigation system is optional on the convertibleBoot capacity is 300 litres with the roof erected The roof folds into a containing bag that reduces boot space to 260 litres 330i BMW can be identified from previous 2.8-litre version by the wide chrome strip on the grille Wheel size was increased over the 328i models from 16 to 17 inches Xenon headlights are standard on all three 330i models Two roll bars automatically deploy from behind the rear headrests in the event of a rollover The convertible has front, side and rear side airbags The windscreen frame is reinforced to act as a roll cage The 3 Series uses strut-type front suspension with coil springs Multi-link rear suspension was a new development for the E46 3 Series Standard is BMW's ASC+T system that employs stability control as well as traction control The 3 Series convertible comes with five-speed manual or sequential five-speed automatic transmission The E46 BMW uses powered rack and pinion steering