I believe the arrow is in reference to the way the car is pointing/facing and it's clearly visible in the bmwfans.info links. Saying "reference to the way the diagram is drawn" doesn't really mean anything (to me at least).
Why does E46 Fanatics block links to bmwfans.info?
FFS. Seriously, with the link blocking?
Last edited by Shonky; 10-11-2012 at 08:07 PM.