See also:

Vehicle Dynamics Control warning light/ Vehicle Dynamics Control operation indicator light
...

For U.S.A
The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”. ...

To help prevent corrosion
Wash the vehicle regularly to prevent corrosion of the body and suspension components. Also, wash the vehicle promptly after driving on any of the following surfaces. - roads that have been s ...