C-Class models sold from next January will be equipped to varying degrees with free extras worth some €4,500.
For Edition C, the added features include AMG body styling in front and rear aprons (and side sill panels on 'Avantgarde' models).
The radiator grille gets an inset star and fins finished in high gloss black, 17-inch light alloy wheels - also highlighted in high gloss black - dark tinted headlamps and chromed exhaust pipe ends.
Interior changes include new Edition-C sports seats covered in Artico leather upholstery with fibre inlays and contrasting top stitching, matching door panels and gear selector.
Other features include a nappa leather four-spoke steering wheel with 12-function buttons, dark aluminium trim, a multifunction colour infotainment display set within the instrument cluster, black fabric headlining, velour floor mats with contrasting topstitching and split folding rear seats.
Describing the Edition C package as "one that injects added appeal into what has been a very successful model range", MB's Sales Manager for Passenger Cars in Ireland, Ciarn Allen, said: "Not for the first time, Mercedes-Benz is adding value to a model range of a kind that will enhance the enjoyment and satisfaction owners will get from their purchase."