Just to give you a frame of reference, I was losing fluid at the rate of max to min level mark over the course of 100 miles. After using the Lucas product, I lost the same amount over 1500 miles. Now, a few years later, sometimes it seems as if the leak has stopped altogether, sometimes I find that I have to add a little fluid. But it's certainly an inconsequential issue now.

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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