I have a 2019 E450 Cab, which is almost identical to the coupe. I also have Air Body Control. Before I ordered this car, I test drive a 2018 Cab. With the exception the tunes up engine and some subtle interior changes (steering wheel), the 2018 and 2019 are the same, AFAIK.

I found the ride on the 2018 Cab (regular lowered suspension) to be stiff and a little harsh. But, this is a sports (or sporty) car. I accept that the design may be for a firmer ride. I chose ABC for my 2019 because I did not want the firm ride all the time. I’m glad I chose ABC. First, I find the comfort mode very nice. It has the car riding in the middle position vertically. A little more drag from the slightly raised position, but nice and smooth. Of course it has the sport and sport+ mode which are firmer but also lower the car to its lowest point. Eco mode is the same as comfort, but lowered the car to the lowest point for reduced drag. Eco is not has “floaty” as Comfort, though but certainly not as springy as sport mode.

but my favorite thing about ABC is the ability to raise the car. I am paranoid about scraping the front bumper on a parking pylon or bottoming out on a funky drain gutter in a road or a steep driveway. Now, if I think it’s going to be a problem, I just raise the car the 4-5 inches and no problem.