I would be cautious about assuming the leak is cured. The RMS for the M112/113 is an unusual design. Rather than a rather flexible viton lip with a garter spring, the M112/113 seal is a stiff material with no garter spring. It isn't uncommon for them to leak prematurely. I have replaced three in my cars, one at 60K, one at 100K and one at 160K. Another oddity is that the WIS states that the seal housing must be removed to replace the seal rather than praying it out while still bolted to the block. And the seal must be pressed in until it is 1mm below the edge of the housing, not flush as one would normally expect. I bought the M-B tool to do so (it actually works on the M104 also).