For 2004, the New Beetle is no longer available in GLX trim. There's an improved TDI engine and restyled 16- and 17-inch wheels. Turbo S models get uniquely styled 17-inch wheels as a late-year addition. New safety features include head curtain airbags and upgraded head restraints. The Monsoon audio system is now standard on the GLS and new GDL headlights are optional. Later in the model year a fixed rear spoiler will replace the power-operated unit and a CD player with MP3 capability will be added. Convertibles get new exterior colors and color combinations. All Beetles get a new fuel cap warning light this year. TDI models can be equipped with a Direct Shift Gearbox (DSG), which is a six-speed manual transmission with electronic control of the clutch and gearshifting. It can be operated in full automatic mode, like a traditional automatic, or shifted manually like a Tiptronic.