Unless you want to look up the specs and get out a micrometer, the best way to find out whether you're dealing with a cigarette lighter socket or an accessory socket is to check your owner's manual or contact the dealership.
Ọ gwụla ma ịchọrọ ileba anya n'ụdị ahụ ma pụọ na micrometer, ụzọ kachasị mma iji chọpụta ma ị na-ejiri ogwe ọkụ siga ma ọ bụ ogwe aka bụ ịlele akwụkwọ onye nwe gị ma ọ bụ kpọtụrụ onye ahịa ahụ.