I think the one on the Mercedes site
may be a more accurate depiction of what the Coupe will look like.
Here's the specs of the concept model.
367-hp biturbo V6 engine delivering 384 lb-ft of torque
9G-TRONIC nine-speed automatic transmission
4MATIC permanent all-wheel drive
186.2 inches long; 63 inches tall; 78.7 inches wide; 111.4-inch wheelbase
LED headlamps and tail lamps
Front and rear underbody protection
Side running boards
Four-pipe stacked exhaust system
Most likely won't have everything on the list.