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Hi, the W stands for winter or wet. The switch changes the way the transmission shift. In w mode the the transmission will start in 2nd gear when accelerating from a stop also the shifts will be softer or smoother. This operation mode is programmed in the ecu to avoid loss of traction in adverse weather conditions. In dayly normal driving you should keep the transmission in s mode since starting in 2nd and soft shifting will increase the internal heat in the transmission thus reducing oil and transmission life in the long term.

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16y ago

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