Mercedes-Benz has released details of its new SLK roadster models ahead of an April 2008 release. With 650 newly developed parts in all, the latest line-up is marked by new-look front and rear sections - the redesigned front bumper with a modified air-dam arrangement enhances the two-seater's distinctive arrow shape while at the rear, a diffuser-style lower section, trapezoidal exhaust tailpipes and the AMG-inspired darkened tail lights have been added. Fetures include a new instrument cluster, three-spoke sports steering wheel and improved audio and telematics systems while under the hood the supercharged four-cylinder and V6 engine options have been boosted in terms of output and fuel economy with the 265 kW/360 hp, 5.5-litre V8 powerplant retained for the SLK 55 AMG .