I have a 2002 CLK55 and the wheels that are on it are 18x8.5 or 9 not exactly sure. The tires seem pretty small to me 225/40/18. I would like to run a bigger tire to help fill out the wheel wells and put a little wider stance as well. What is a good upgrade size? Thanks

225/40-18 is the correct size for your CLK .... some people have used a 235/40-18 but, you can't get much more tire than that under the front fenders

Thanks