BMW Repair Questions? Ask a Mechanic for Answers ASAP
A common leak area for these transmissions is the wire harness housing that goes into the transmission on the upper rear right side of the transmission, there is a updated housing with updated seals part # XXXXX 34 7 588 725
Have a BMW specialist look at it first.
As for the shifting issue you might need transmission software update, only the dealer can do this for you