Tweaked styling and new alloys freshen the exterior of the SL roadster. Underneath, ESP keeps drivers on track in lousy driving conditions. It comes standard on the SL600, and can be ordered for the SL320 and SL500. Side airbags are standard across the board. A five-speed automatic is included with SL500 and SL600. Cool gas-discharge headlamps are not available on the SL320.