Cmac - those need a full refinish. You could try Leatherique. Clean, strip and re-color. They should turn out well if there are no actual tears. Check out the customer pictures on the site, some impressive results. I've heard a lot of good reviews on Leatherique's products, though I have no personal experience.

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Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon