Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber StartVOLT "VSP 0813" - Not availableMERCEDES-BENZ - C-Class, E-Class, S-Class, CLK; SMART - Fortwo, Roadster; KIA - Ceed, PRO Ceed; HYUNDAI - Veloster, Sonata; ...