A thinly camouflaged prototype of the Mercedes-Benz SLC has been spied undergoing testing on a rainy day.

A thinly camouflaged prototype of the Mercedes-Benz SLC has been spied undergoing testing on a rainy day.

Mercedes-Benz's new nomenclature has already affected a few models and there's one more on the way as the SLK facelift will be sold with the SLC moniker to denote the roadster is similar in size with the C-Class. The current generation R172 was introduced more than four years ago at the Geneva Motor Show so naturally time has come for a nip and tuck as part of the mid-life cycle refresh.

Don't hold your breath for significant changes as the camouflage fitted onto this prototype indicates the revisions will be modest, with some updates for the bumpers and fresh graphics for the headlights and taillights.

Chances are the range-topping SLK 55 AMG will be called Mercedes-AMG SLC 63 and will come with a twin-turbo V8 4.0-liter engine borrowed from the C 63 / C63 S where it churns 476 HP / 510 HP, respectively. There also might be an AMG Sport model positioned right under the fully-fledged AMG version and should get a twin-turbo V6 3.0-liter with 367 HP (270 kW) and 517 Nm (382 lb-ft) as seen in the C450 AMG Sport.

An official introduction will likely occur in September at the Frankfurt Motor Show, but most likely Mercedes-Benz will decide to show us the car sometime in August.

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