8 Piece Set of Bosch OEM Spark Plug # 0242135509 / YR7MPP33 / 7424 - Mercedes Benz #'s 0041591803 100% NEW Genuine Bosch Spark Plug Set (8 pcs.) Bosch #'s: 0 242 135 509 / YR7MPP33 / 7424 Mercedes Benz OE #s: 004 159 18 03 / 0041591803