Which model car? Which engine type? For example: Model C240; Engine Type M112.912 is 170 to 172 MM. S600; Engine type M137.970 is 114 to 116MM. S500 4Matic; Engine type M113.969 is 119 to 121 MM. SL55 AMG; Engine type M113.922 is167 to 169 MM. This is just an... Login to read more.