Good day all. My first post. I'm experiencing my 2nd cracked AMG rim on my W212 E550 4-matic, air-matic. The first one had 3 cracks I had repaired for $225. With this second one, I am shopping for new oem rims. I believe my factory rim size is 18x8 front and rear. I saw a set of four S63 rims (18x8.5 front, and 18x9.5rear) on ebay. But I am concerned if 9.5 inch rims would cause interference if my air suspension settles all the way down as it sometimes does if the car sits for a few days? I believe my oem 8in rims have 245/40 x 18in tires. It looks like the 9.5in rims can accept as small as 255/40 x 18. So I think I will be ok, but always better to look before leaping Thanks all!

moved to W212 forum...
S-class rims' offsets prolly won't fit on W212...

Thanks MJ. At least that gives me a direction to delve further into. I appreciate your input! Thanks again... AL

Fix the Airmatic leak... because that's going to be expensive if you let it linger. Not to worry you, but start to accept that it may be a few thousand in parts since these cars are approaching 10+ years and 100k. Air struts, rear air springs, valve body and compressor.

I wouldn't worry about larger rims, get the cracked ones repaired or reman ones for a few hundred first.

Thanks M3. Ha, I just sold my E46 M3 back in April. That car was so much fun to drive! But I do like the E550 better as far as long trips go of course
Yea, I want to fix the air-matic leak. I'll have to learn more about that system. Yea, my mechanic mentioned about $1,500 per quarter for replacement. How do I find out where the leak is? ( I imagine the OBD won't report it, so I am wondering if one can put green dye like in an air conditioning system to find the leak)? Thanks again M3...

There's lots of threads on the subject, here's a start:

Thanks so much M3. Much appreciated!