Colby: The MM minder tells you when to do various maintenance items. B 1 is oil change and tire rotation. A 12345 is oil + filter change, tire rotation, air filter, plus others. It is explained in your manual, which I know you have read! If you go the yr. without putting enough miles to trigger the MM the manual says to change the oil. So do you reset the MM or leave it so it will tell you when to service the other items. Hope I did not confuse you more.H