If the struts are Bilstein they should never wear out check an see. Of the few E class I've ridden in, I'd say they are rather soft suspension wise. Soft struts, springs and sway bars. I'd say you're stuck with it unless you want to buy stiffer components.
I was even pulled over in one once for suspected drunk driving. All I was doin was getting my wallet out, but I was moving the wheel ever so slightly while doing so and the car was all over the lane. Too soft imo, but that's the way it is.