Could the color of the ash tray insert be based on whether leather or tex interior?
No, John.
This is not a primary question of leather versus MB-tex but only of the interior color code itself.
As Alfred mentioned earlier, only 230 SLs after 012467 had "colorful" lid inserts, all the ones before had only black.
The specific color of the padded insert was chosen in line with the interior list (Ausstattungs-Liste), which Alfred showed earlier.
The insert was always plastic liner, nothing else.
Achim
(former 113 ashtray collector)