What does SSV stand for in cars?

Could you elaborate on the abbreviation "SSV" in the context of cars? I'm interested in understanding its specific meaning and application within the automotive industry. Is it a technical term related to vehicle components, a particular model or trim level, or perhaps a safety or performance feature? Could you provide some insight into its origin and how it came to be associated with cars? Any clarification would be greatly appreciated as I'm curious to learn more about this abbreviation and its relevance in the automotive world.