When I bought me car in 06 it had leather but I was in the mindset of doing an inexpensive cosmetic refurbishment. I figured with MB Tex or vinyl, I could work with a material that would be more forgiving from an installation standpoint (which it is), and that would allow me to do it myself. After getting more involved in the car, I found myself going down the rabbit hole of refurbishing just “one more thing”. Before you realize it you reach a point of no return. Yes, vinyl, or MB Tex as everyone prefers to call it, will keep its original appearance longer than leather, but in my opinion, when given the choice between the two, with everything else in the car you will ultimately invest in, leather is the way to go. Once you make that decision, you have to decide the kind of leather you will use. Most people with newer or more recent leather interiors will use an aniline dyed leather where the color is through the leather. This is not what Mercedes originally used in these cars. Mercedes used leather from a now defunct company called Rosser which provided a vegetable dyed leather where the color is only on the outer surface. When comparing the two types, there is a distinct difference in the suppleness and texture of the leather. Most of the popular interior suppliers including German Auto Tops, GAHH and Heritage can provide what they call Old-Timer leather which is about as close as you will find to the original leather used by Mercedes. Once you search these forums, you will find that much has been discussed about the Leather vs. MB Tex options.