Mercedes has some hot-selling models in the SL, SLK and CLS, but the German automaker isn't about to sit around twiddling its thumbs. Instead they're working on facelifts for all three, poised to hit the market around this time next year.

The changes to the three models are expected to be mostly cosmetic, with little mechanical differences over the versions currently available. But of the three, the SL is tipped to get the most substantial face-lift, with insiders deriving from the spy shots that the new SL will do away with the circular headlamps in favor of the boomerang-shaped lights borrowed from the CLS.

Its little brother, meanwhile, is also getting a minor update, details of which we brought you just last week.

In advance of an anticipated onslaught from competitors entering the segment, the CLS four-door coupe is getting what appears to be a little butt-lift and a new grille borrowed from the CL coupe.

If the sources are correct and the SL adopts the headlights from the CLS, it could become a new corporate styling element across Mercedes' coupe and convertible range.

[Source: Car magazine]