6 required for Sprinter 3.0L Mid 2012 and Later 3.0L V6 engines These are a 7.0 volt ceramic core glow plug and are ONLY to be used with the Glow Plug Control Unit shown below.
These glow plugs are also used for other Mercedes 3.0L V6 diesel engines (from June 15, 2012 (engine number 41330714 and later)These are the original NGK plugs, They are the same exact plug sold at a Mercedes dealer.