There is a rubbery sill between the metal plate that says mercedes benz on it where you enter my E350 and just above the carpet that I can't get clean. The car has a light colored interior and this rubbery thing has scuff marks and is generally dirty from when I enter and exit. Any suggestions on how to clean it?

 

Try some soap and water, armour all, or some silicone protectant. Maybe some tire black to re-color the thing. If that doesn't clean it or bring it back, then there is a product called: "A-Brand-New-One!" It may be a little costly, but it works great!

Hope this works for you! Have a great day!