So far so good.
First impressions:
Car is quieter than my 2014 E400.
Body roll - something I guess I will just have to learn to deal with with MB.
Active Steering assist on top of Lane Departure warning- wicked! Braking on the opposite of the wheels feels... wicked! First time it happened, thought I was in a winter icy skid.
Lane departure warning steering wheel vibration almost too subtle vs. the E400 (w212).
Dynamic headlight (Advanced lighting pkg) - inner lights are brighter than outer. The E400 had brighter outer lights.
Still prefer the number key pad for phone dialing.
Rear hatch opens way high - can it be adjusted on the GLC?
Upgraded radio has pretty solid bass.

Thanks!

Night pkg does look sharp!