With my measuring tool and plenty of Redline D4 in hand, I hit the open road to see how low the ATF level was on the 98 E300D I just bought. After a good half hour run, I checked the level and it was in the middle of the range....the 25C range, that it is! Yikes!! But, the shift quality was perfect. So I've begun adding very gradually....about 16 oz. so far....but's still a bit low. Needless to say, I have absolutely how long it's been leaking. But it will be fixed next week.

How low would ATF have to be to damage the 722.6 tranny?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 160k miles
06 E320 CDI "Rutherford", Black on Tan, 180k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 79k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife