I would expect the hub will have to be pulled so you could start the tap from the back side of the hub. Are we talking a front hub or a rear hub?
I don't know anything about the ML, but expect there to be a difference between front and rear, hopefully someone can guide you further.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.