I went to an internet part seller that displays the Mercedes part number = 0119975147
If you go to NAPA online there is Search Box for the Part Number and there is a small interchange Box. Select the Interchange Box and search.

When the Seals come up but there will be no price you need to select a store and when you do that it will ask for a Zip Code and then stores near your Zip Code. After you select a store the Seals will come back with a price.

What I got was Wheel Seal-Front Part Number-NOS 17654. Product Line NAPA Oil Seal. This one turned out to be as expensive as one from the Dealer.

The other Seal they carry part number ATM 2118445. Product Line Altron Imports was less than 1/2 of the other seals price.

The MSRP from the Mercedes Dealer is $13 each if the Dealer is willing to go by the MSRP.

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84 300D, 82 Volvo 244Gl Diesel