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Old 11-09-2012, 11:33 AM
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Costa Costa is offline
Officially Welcomed to the 'Fest
Location: Vancouver, Canada
 
Join Date: May 2011
Posts: 887
Mein Auto: Supercharged E34 540i6
S1 is essentially M1 because it cannot shift out of that gear. S2 and S3 is sport mode for the first 2 or 3 gears. All sport mode does is hold onto the gear more and shifts up at higher revs. M1,2, and 3 are manually selected gears. Meaning, you can change them whenever you want to.
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