ronk said:This is what it says in the book - I don't feel inclined to do anything else - Im sure that BMW's engineers have their reasons.
(2016 publication issue)
IMG_3742.jpg
That might be relevant to E89's. My manual, for my 2005 car, states this:

The section on connecting/jump starting states:

So, you can use either, even for jump starting. E85/E86's are obviously more robust than their lightweight cousins....