6 required for Sprinter 3.0L Mid 2012-2018 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 SprinterV6 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.
Sprinter II Mid 2012-2018 3.0L V6 Diesel
Also for Mercedes Benz Non-Sprinter vehicles 2007-2018 using the ceramic core glow plugs Do not try to remove glow plugs from a cold engine.
Before attempting to remove any glow plugs, start the engine and allow it to reach operating temperature. Failure to do so will probably result in shearing a glow plug off in the aluminum cylinder head. Before installing any new glow plug, coat the new glow plug threads with a good quality anti-seize compound, to facilitate easier removal in the future.