I have a set of 4 on my car in chrome..... I also have a set of the older version with the old AMG logo and has a smaller center cap that is bolted on, which are black with silver lip, but would need to be refinished...

3 hold air just fine, one has a very slow leak, maybe 10 psi after 3 weeks, havent bothered to check it. one was welded, but not sure if that is the leaking one.

seem to balance fine as well.

I could consider selling a set if the price is right...

__________________
'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon