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German car mag Auto Motor und Sport is reporting the $500,000 Merc SLR is up for a performance makeover. Mercedes officials are mum, but word is the next model of the hand-built, gull-wing door'd supercar will reportedly get a horsepower increase from 626 to 650 hp, a firmer suspension, new brakes and a lighter comportment — as well as a few interior tweaks and 19" alloys. The horsepower increase is expected to improve zero-to-60 times from 3.8 seconds to 3.6 seconds, while the rest of the improvements are strictly to keep Paris Hilton's American Express Onyx card from getting too comfortable.

Mercedes SLR McLaren Due for a Major Update? [Edmunds]

Related:
Handbuilding the Mercedes McLaren SLR [internal]