I agree with MBenz...Techs will tell you not to. I lowered my 400E and it feels like an all new car. I used to think the car was set up for grandma driving, but after the springs/wheels combo, damn it's a blast to drive. Everyday I find myself pushing the car a little harder in the turns, just to see what it'll take and I love it. I WOULDNT HAVE DARED DO THIS BEFORE THE DROP. And to me, it looks bad ass!
oh by the way...Dont just do the springs. You may need to buy an adjustable bushing kit and some new shocks, and this gets pricey!