The p/n is 123 584 49 26 - it's the black emissions label which is attached to the cross member in front of the radiator when the hood is opened. I had the misfortune to smudge mine

with some solvent and I would like to replace it with a new one. The dealer told me it is no longer available.
Any help would be appreciated - this is for the 617.951 5 cyl turbodiesel in a 1983 300SD.