I'd like a 2 sets. One for now and one for the next car that has a non-working odo.

Is this information enough for you to make them? It looks like there are some variations.

Odometer Gears - Mercedes-Benz - S class (126) 79-91 Diesel

My 84 SD has a working odo. I could count those but the speedometer is off and I don't know that the odometer is correct.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.