The W&S are winter or standard/summer settings for the transmission. It starts the car in 2nd gear going forward, and there is actually a 2nd reverse gear as well, for increased traction.

I have loved my '99 E300 so far, and would recommend one to anyone...they are so smooth and quiet..(provided you run good fuel)..

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2004 Ram 2500 Cummins HO
2000 Jetta TDI
1999 E300 (sold)