I drive a 2005 W900. There is a rubber seal on the Interior side of the passenger side door around the blind spot window near the floor. This seal has a pull tab on it . I am guessing it is to remove the inner glass so that you can clean the inside of the outer glass. Has anyone done this in there truck? I messed with it a little but the glass didnt come out easy like I thought it would. It looks like I'll have to pry it a little but haven"t yet.Any advice would be greatly appreciated.