Just added a new member of the family, my first diesel, a 1980 300SD Turbodiesel. She is a beauty, if I do say so myself. I have been searching topics on this forum to learn about the W116 and especially diesels. I could use some help to figure out the codes on the metal plate on the cross member in front of the radiator. The codes are as follows:

3 6B 9546720 61
116120 12 08025 7
473H M -
531 588 592 639 800
440 467 491 518

Any help with each of the codes will be greatly appreciated. I expect as a new diesel owner more questions will be forthcoming.

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• 2001 E320