c32 calipers ??
So while mounting may work perfectly, your brakes may not!
FWIW,nearly all disc brake systems use the same caliper on both sides of the car:the only changes are that the bleed and brake line connections trade locations.(and the calipers themselves are flopped over)...Each side of the car's brakes see an opposite relative direction of rotation.
FWIW,the C32 rotors are about .6" larger in diameter than the SLK's.The car's ABS system would be a potentially serious hurdle as well.
If it were my car,I'd look at an aftermarket upgrade.



