Mercedes' new SL roadster to feature all-aluminum body

The SL550 is powered by Mercedes' new 4.6-liter V-8 engine with 429 hp -- a gain of 12% -- but still offers improved fuel economy.

DT

By:

Diana T. Kurylko

December 14, 2011 05:00 AM

The sixth-generation Mercedes-Benz SL roadster scheduled to be unveiled next month at the Detroit auto show will have a new, all-aluminum body shell.

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