Austin Yellow Panniers

[Grumpy Goat]

Wayne A&S and MAX BMW show WN2S for the paint code.

FOR VEHICLES WITH
AUSTIN YELLOW METALLIC MATT (CODE: WN2S)

COLOR MIXTURE CODE
M3L AUSTIN-YELLOW

I'd go with that since it came from the dealer websites. 

I will confess that the code I provided was by touch-up paint manufacturers. I suppose the codes could be according to different schemes but are actually equivalent ...? No idea - just trying to help.