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.
Mercedes-Benz C-Class was created in 1993.
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The 2010 Mercedes-Benz C-Class has a V6 engine.
The 2006 Mercedes-Benz C-Class has 24 valves.
The 2014 Mercedes-Benz C-Class has 16 valves.
The 2004 Mercedes-Benz C-Class has 16 valves.
The 2009 Mercedes-Benz C-Class has 24 valves.
The 2010 Mercedes-Benz C-Class has 24 valves.
The 2008 Mercedes-Benz C-Class has 24 valves.
The 2009 Mercedes-Benz C-Class has a V6 engine.
The 2012 Mercedes-Benz C-Class has 16 valves.
The 2002 Mercedes-Benz C-Class has 16 valves.