First, let's get this out of the way: The vehicle in question isn't a coupe; it has four doors and five seats, and it's related to the large Mercedes-Benz M-Class SUV, which will soon be redesigned and renamed the GLE-Class. This new variant is actually first on the scene and presumably at dealerships, and it carries the name "GLE" "Coupe."
I was the first Cars.com editor to see the GLE Coupe in person. I don't usually fixate on styling because I know you, the reader, will form your own opinion in as little as a fraction of a second, but presumably the only reason for a "four-door coupe" to exist is its styling. In my opinion, there has been exactly one four-door coupe whose styling justifies its existence and that's the Audi A7, a car rather than an SUV. All the others can go back where they came from, which seems to be Germany.
My first look suggests the GLE Coupe doesn't need to exist.