Appears to be an M-flavored version.

[UPDATE] Additional images have been added at the end of the gallery. These are showing a right-hand-drive prototype in a lesser configuration.

The Mercedes S-Class in droptop form will soon have to face a new competitor as BMW is hard at work putting the finishing touches on the first-ever 8 Series Convertible. Seen here undergoing testing, the fully camouflaged prototype appears to have all of the production body panels in place, as well as the headlights and taillights. Speaking of which, the rear ones have swanky graphics and might be of the OLED type as seen on the aforementioned rival from Daimler.

Update:

Despite the extensive amount of disguise, it’s easy to see the road-going model will stay true to the 8 Series concept unveiled last year and pictured below. The fixed metal roof will be removed to make room for an electronically retractable soft top, while the front and rear bumpers are set to lose those massive air vents for a more down-to-earth appearance.

Even though it’s going to eschew some of the pizzazz on its way to the assembly line, the 8 Series in both coupe and convertible body styles will be quite the looker in our humble opinion. The prototype caught on camera by spies had some M extras judging by the blue brake calipers and what must have been generous air vents lurking underneath the front bumper’s mesh camo. Two fat exhaust tips at the back could also be a sign that we’re dealing with a performance version of BMW’s flagship cabrio.

The M goodies seen here likely belong to either the optional M Sport package or are reserved for an M Performance version set to be positioned right underneath the full-fat M8. Either way, we’re dying to see the car without its camouflage, though we will have to patiently wait as the first order of business in Bavaria is to roll out the standard 8 Series Coupe due later this year.

Aside from the road-going coupe and convertibles in regular and M8 flavors, BMW has also engineered a track-only M8 bound to compete in the GTE Pro division of the 2018 FIA World Endurance Championship.

Photos: CarPix, Automedia

BMW 8 Series Convertible new spy photos