I hope the title brought you to the right spot. This is the hose which breaks down and causes gasoline fumes to leak after filling up your gas tank to the top. This is for a 1997 C36 and W202. This is same for a CLK W208, and possibly others models around the same year.
Hose: 5/8" inner diameter fuel hose, in 5 3/4" in length.
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.