Mercedes-Benz SL-Class (R231)

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R231 is a chassis code for the current generation of the Mercedes-Benz SL-Class roadster, replacing the R230. The car was released in March 2012 and uses Mercedes-Benz’s new 4.7 litre twin turbo V8 engine with a power output of 435 PS (320 kW; 429 hp). AMG version of the roadster will follow. The new SL is 140 kg (309 lb) lighter than the previous, being made almost entirely out of aluminium.[2] For the first time, the R231 SL-Class is not available with a non-AMG V12 engined SL 600 model.

The R231 is designed with an aluminium space-frame, 182 in (4,623 mm) in length by 83 in (2,108 mm) in width. (2 in (51 mm). wider/longer than previous generation)[3] Engineers at Mercedes have also installed a new folding hardtop roof with a panoramic sunroof that will have as an option, variable tint.[4] The design process began in 2007, with a final design by Frank Pfisterer and Mark Fetherston being chosen, delayed for over 2 years, and then approved for production in early 2010. Design patents were filed on 5 August 2009 using a CAD file and in German patents in April 2010 using a prototype[5] Changes from last generation include all-aluminium body, MAGIC VISION CONTROL windscreen wipe/wash system, FrontBass footwell bass loudspeakers, HANDS-FREE ACCESS boot lid opening system via foot movement around rear bumper.

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