Brand is irrelevant. If you're just topping off, any Dexron-III/Mercon compatible ATF is fine.

If you need to top off, then you've got some sort of a leak (unless you didn't drive it for a long period of time). At what rate is the level going down?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife