When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
It identifies the mode (one of several available on A & B-Series WRXs -U8, W6, W9, V9, 1C, 2C; I dont think that it has any deep meaning beyond that. Id ditch it in favour of a Z4 if I were you. Much better map and itll make 260PS on Optimax.