The H&R Cup Kit is a great kit of specially matched springs and shocks, if it is what you are looking for. For some, it is too agressive for the street. The cup kit lowers the 320 2" in front, and 430/55s even more. The first question you should ask yourself is, is this too low for you? A common misconception among Mercedes owners is that a camber kit is always needed to correct negative camber. Negative camber is not always a bad thing. In fact, minor amounts, such as what you would experience are in my opinion good. Negative camber will place the lower portion of the tires outward, increasing surface area on cornering. It will also help counteract the premature outer wear that many CLK owners experience on their front tires. If you choose to lower your car, I would encourage you to keep the camber and rotate your tires (not wheels if directional tires) at their half-life to the opposite side (not corners in staggered setup).