6 required (Glow plugs could be either Bosch or Beru. Both are original equipment suppliers to Mercedes)
For 3.0 Liter V6 diesel 2007-Mid 2012
For model year 2012, these steel glow plugs were used up to June 15, 2012 thru engine number 41330713, after which the ceramic plugs, shown below, were used.
This is a 4.4 volt steel plug and NOT a 7.0 volt ceramic plug
Sprinter II 2007-Mid 2012 3.0L V6 diesel 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 could 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.