As a German, I'm a bit curious why is this being downvoted. I had the exact same thought (two anecdotes don't make anecdata, I know, but), let me tell you why:
I just don't think there's a market for this here. No one in my age range (mid thirties) or income level (SWE, comfy living in large German tech focused city) would think of buying a Mercedes Benz, let alone an electric one.
For one, these things are expensive especially new, which the electric one would be. If you're looking at it from the young-environmentally-conscious angle, I don't think there's any trust towards Mercedes Benz to be doing this for the right 'reasons,' i.e. not actually caring about the environment, or going about it in a bad way.
They are scramblin' to keep up after sleeping through the electrical car revolution and have nothing new to offer. Their approach and entire business model is deeply entrenched in traditional gas cars.
Even if someone like me could afford the car (due to good job and income matched to levels in expensive city), by living in said city, they wouldn't need a car to go anywhere!
I just don't see people who could afford an electric Mercedes buying one because
people like that think global warming is a hoax, hate Greta, and buy diesel cars out of protest.
I'm almost surprised they sold that many cars, actually.