Now this is pretty epic as it really doesn't look like a Mercedes at all, except for the grill of course. This isn't your typical design that you would see..very far off actually. Manufacturers typically follow a design that is true to them. Every Porsche looks like a Porsche. Every Audi looks like an Audi. You don't confuse them. If you were to remove the grill from this supercar however, you wouldn't know it's a Mercedes. It's an independent design.
As much as I like this when it comes to design, it still needs more going on from what MB currently has to look like a true Mercedes.
Taking more inspiration the following concept would do it a lot of good. I get they want to make it look like a real EV but at the same time sticking to what they do is also important.
That's just part of where supercar design has been heading lately. Many examples out there of it from a number of car makers. The McLaren P1 is one good example of these "opened back" (or what ever you want to call it) supercars:
I absolutely love the rear end of the Chiron. I think this is the first Bugatti I actually appreciate aesthetically. Hated the way the Veyrons looked. Take it one step further to the Bugatti Vision GT and you have a real winner.
The Chiron is what Bugatti finally got right. The top speed on that thing is still unknown however which just adds that much more interest into it. There's something about these new supercars and hypercars coming out.. just when you think they can't get any crazier, they find a way to take it those few steps further.
Even the Veyron had some amazing design during the time it released but being a product that stuck around for a while in a market with design that's drastically changing its easy to see how it looks bad over time. Chiron just keeps them relevant with the times, much like what most car makers do after a successful run of a generation.