Dude, you're old. Talkin' about how the car drives, of course I care about how the damn car drive. The speedo gets affected with the wheel diameter also I am aware of that, 1 or 2 mph off will not bother me. And what bolt spacing are you even talkin' about? Did you mean the bolt pattern? Mercedes are all 5x112 bolt pattern. Yeah I want to f*cking look cool with 18" wheels.Here ya go: Ejelta.com: Tire Size Calculator: 205/60-15
This chart should show you what the final diameters are of the different tire sizes available. There are some 18" tires with very narrow aspect ratios that will give you about the same size diameter as either the 15 or 16 inch rims/tires that came with the car. That is important if you want to keep the speedo even close to what it should be without some other mod to change the ratio.
Whether the bolt spacing on those rims will fit I have no idea. And if they do and all you are worried about is looking "cool" then go for it. Now if you care about how the car drives that's another story. You are putting tires that are much wider than what it was designed for which will affect the steering geometry and they may rub against the edge of the wheel well. But they will look cool, especially sitting still in some parking lot.
+111111111Just for curiosity I plugged the specs into a wheel offset calculator on line against my E55 MonoII's and came up with this. For reference My Monos are 8x18 ET31 and 9x18 ET35 and they fit my C36 with only slight rubbing in the rear. I have had these on a C280 and the fronts rubbed big time. The difference here is the C36 has rolled fenders up front. Clearance on the fender side of the rim is tight both front and rear. Now to your wheels.....it looks like the wheels should clear your fenders just fine as the offsets you have will pull the rim edge in 7mm front and 5mm in the rear compared to my set up. The tricky part will be if you have enough clearance on the inboard side of the rim or the suspension side. An additional 19mm front and 17mm rear. Of course you could space them out a tad perhaps 5mm but that would be an extra expense. Now even if this all fits.....here is the biggest consideration (for me at least). The W220 uses 14mm bolt holes vs the W202 which used 12mm bolt holes. I would suggest finding a set of W210 E55 rims and pass on the headaches.