91 and 92 300D. I'm told that the drain plugs for the torque converter and the transmission pan have seals/washers (smaller aluminum and larger copper, respectively). Do these need to be replaced when the fluid is changed? If so, where would I get them (other than the dealer)?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife