Acclaimed Bulgarian interior specialist Vilner has revealed its latest project based on the Audi S5. Exterior enhancements include a matte grey body wrap coupled with a radiator grille, trunk spoiler, diffuser and alloys finished in gloss black. But as always it's the cabin that's of most interest. Every inch of the interior has been swathed in upholstery combining black and brown leather with Alcantara. The seats are covered in leather with diamond stitching used on the base and shoulders, and black Alcantara on the bases.

The micro-suede material also covers the roof headliner, pillars, rear-view mirror and dashboard, while a strip of contrasting black leather runs the length of the rooflining and along the rear seats. As a final flourish, the customer's initials have been stitched into the front headrests, considerably restricting the list of potential buyers if the owner ever wants to sell.