I was wondering why BMW would add a bottom drain plug and still have to be filled thru the sensor hole? Never did check the fiche, but it's there. Doesn't help me any, but good to know if you didn't. Don't forget, you'll still want to lube the splines now and then.
HP-2, 2007 RT-P, both gone. Now the CB
Riding this one 'till I drop...........