| http://www.w3.org/ns/prov#value | - This is achieved, in part, thanks to Audi's cylinder on demand system.Both have a seven-speed S tronic gearbox, Audi's quattro four-wheel-drive system and adaptive air suspension.As well as being slightly longer than the standard A6 and A6 Avant, the S versions come with sporty styling inside and out, including rear spoilers, four chrome-tipped exhaust pipes, chrome detailing on the front bumper a
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