I recently changed mine using a genuine Mercedes insert. Prior to that I had used a Bosch one. The Bosch insert was trickier as it came with only the rubber insert and I had to re-use the existing metal strips. However, the Mercedes insert came with the rubber wiper strip and the metal tension strips already in place and little yellow plastic snaps that were holding the whole thing together.
So I simply yanked the old rubber/metal inserts out and the new Mercedes one slipped in easily. As I slid it into place, the yellow clips just pop off. 45 second job. The Bosch insert took me a good 5 minutes...
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