What about the wrench to hold the ball joint from spinning, 18mm? - but needs to be thin.
first of all 18mm is an odd ball - doesn't come in the standard "wrench set", PLUS its got to be so thin - another BMW "special tool"

I HATE buying these "one time" tools, defeats the purpose of DIY......
Another Harbor Freight trip, I plain on buying a cheep 18mm wrench and grinding it down