MB Crankcase side stud,

6mm stud 16x10x11mm

you need 14 for most crankcases. 

This stud is for the crankcase side, you need 14 for most crankcases.

If youre using a Clubman then you use 13 of these and 1 of the longer tailpipe stud.

MB have redesigned these so the long end goes into the casing to find more threads, especailly if the threads are a bit dodgy.

If the stud bottoms out its because some casings are not tapped deep enough.

So!!  if the stud does bottom out, tap down with a 6mm tap MBU0915 and tap holding tool tl5881