Hello, as others have said, you'll need the data card, if you don't have one, a copy can be ordered, i think from an MB dealership
Have a look on here, this example of a data card has a three digit code top right hand corner, 131, this tells you whether the upholstery was originally leather or MB tex, and the 2 digit colour code
https://www.sl113.org/forums/index.php?topic=37170.msg271792#msg271792All of this detail is in the technical manual, but you'll need to register as a full member to access it
Once you have the original upholstery code, there are a few preferred suppliers who you can try, if you search upholstery, or leather colour, you'll find lots of posts and preferred suppliers