BTW- Look what I found by doing a search. These are the MB approved transmission fluids. I have a bottle each of Valvoline Max Life Dexron III/Mercon ATF in the trunk of both diesels, it's not specifically listed here, but it probably falls under the Valvoline brand ATF listed.

For transmission fluid:
Castrol Dexron III
Castrol Transmax
Chevron Dexron III
Citgo Multi-Purpose ATF
Exxon Superflo Dexron III
Havoline ATF Dexron III
Texaco ATF Dexron III
Pennzoil ATF
Quaker State Dexron III
Sunoco ATF Dexron III
Unocal Multi-Purpose ATF
Valvoline ATF Type D

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.