Whatever you want it to be in. I guess you could consider S to be the normal mode.

S is for first gear start.
W gives you 2nd gear start and lower upshift points.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record