The S light flashing means there is a fault recognized by the the computer in your car having to do with the transmission. You need to retrieve the codes stored, you will probably find the Vehicle Speed Sensor (VSS) has failed it is mounted on the top rear of the transmission. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online