Using a random VIN# off ebay entering a GU VIN #, I believe it 2 be
QM1 = White
W = Grey
In Nissan fast, K also = Grey ( I don't know it there is any difference between the 2 )
Hope that helps
Cheers
Todd
PS: Post up an intro in the introduction thread when you get a chance
PSS: PM me your VIN# if you want, that will give you an exact match in nissan fast, or just download nissan fast from the forum