[Olddriver60]

I must have one of the very few sport line trim level 320i's with the wing badges, the dimensions you should use are (and before anyone says anything my neighbours 2015 320d m-sport has the wing badges and the co-ordinating dimensions are the same

Depending on which side of the car you are looking at the co-ordinating measurements are
Bottom left / bottom right hand corner of the badge - 52mm from the wing vertical edge / door shut line and for the same reference point 410mm from the bottom edge of the wing (not the sill) the bottom edge of the wing, note the badge is parallel to the bottom edge of the wing

Go for it!