VDC stands for Vehicle Dynamic Control, which is an electronic stability control system that uses computerized technology to detect wheel slippage before it occurs. VDC is designed to help drivers maintain control of their vehicle in difficult driving conditions, such as when driving on slippery or uneven surfaces. It is a safety feature that can help prevent accidents by automatically applying the brakes to individual wheels and reducing engine power when necessary to help the driver maintain control of the vehicle.

VDC is typically turned on by default, but some drivers may choose to turn it off. However, it is generally recommended to keep VDC turned on, as most accidents reported have been with VDC turned off, especially if the driver does not have experience controlling the car. VDC can be particularly useful in adverse weather conditions, such as snow or rain, where it can help prevent the car from sliding or losing control.

Different car manufacturers may have their own unique versions of VDC, such as Subarus Vehicle Dynamics Control or INFINITIs Vehicle Dynamic Control. Some car enthusiasts may also choose to turn off VDC when driving on a track, as it can limit the cars performance and speed. However, this should only be done by experienced drivers in controlled environments.