Yes JitP, I have a 43 but not the coupe, we are hit hard but you will love the car.
Mine was delivered March 1st and it is a superb car.
If you had the agreement fingers crossed the manager will honour it, all dealers were aware of the increase in cost after April 1st.
May be worth filling in your location on your profile so we know where you are based, helps with replies as different rules apply and specs for different countries.
2017 GLC AMG43 premium plus, night pack, leather, intel lights, 360 camera.