Lexus' upper-crust convertible loses its Lexus Link assistance system, but otherwise sees only detail changes for 2005. The SC 430 features a power-retractable metal roof and a small rear seat intended for occasional use, mainly by kids. Its 4.3-liter V8 and 5-speed automatic transmission come from Lexus' flagship LS 430 sedan. Standard are front side airbags, ABS, antiskid/traction-control system, tire-pressure monitor, 18-inch wheels, leather/wood cabin trim, navigation system, and premium Mark Levinson audio. Options include rear spoiler and run-flat tires. The optional run-flats have all-season tread, the base tires performance tread. For 2005, the SC 430 gets revised shock absorbers and a navigation system with more-detailed screen graphics and a larger DVD database.