Achim, I don't really have an interest in being right or wrong, per say. I only want to represent what the literature tells us. Even so, we also have to remember that it wasn't uncommon for Mercedes to use a different color if they were out of another color. So that may also have some bearing on this.....maybe.
However, I must correct myself....or at least try to explain where I misspoke in my previous commentary. ( I screwed up) Initially, I was only looking at leather interiors and not MB-Tex. It turns out that the early 230SL with interior trim code 122 (Hellrot MB-Tex) did have a light colored entrance rail sill mat....6415 beige. But not creme`. However, interior trim code 117 Rot did have grey sill mats. To our eyes there is an obvious difference between creme` and beige, but I'm not sure if Mercedes thought so. So your guess is as good as mine. I just wanted to let you know that I now see what you're talking about. However, nothing in any of the literature I have states that any of the red leather interiors had anything but gray entrance rail sill mats, that only the MB-Tex hellrot interiors had a beige sill mat. So at this point I'm going to just accept that some red leather interiors had light colored entrance rail sill mats for unknown reasons.
And thank you for the kind words and vote of confidence. Yes, I'm the new guy that no one wants to listen to. That's just how it goes. I can only hope that after a while my commentary will mean something to those who read. It is very hard not to come off as a "know it all", or as condescending or conceited. I'm the furthest thing from any of those. I just don't know any other way to relay the information......maybe if I make a video about some things and post the link that'll help to get rid of the stigma of it all.
So again, I see what you're talking about, and I hope you and the other readers will understand why I initially said what I had said. My apologies for any confusion.