Safety
(my first ///M a e46 once saved my life so for me it is safety knowing the horses are there to pull me out of a unsafe situation).
another word comes to mind ...
Versatility
I'm fairly sure that was foremost on the minds of the ///M Division Engineers when the ///M Division was founded way back in May 1972 when it was first established with a handful of employees that now has grown to nearly 500. For the ///M car has many qualities