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How to Replace the Glow Plugs in a Mercedes M-Class?

Model: Mercedes Classe M W163 - Years: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Part: Glow plugs

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Video tutorial

Replacing the glow plugs in a Mercedes M-Class is straightforward; follow this tutorial. First, clean the top of the engine thoroughly and spray some penetrating oil on the glow plugs.

While this takes effect, disconnect the various power cables using a flathead screwdriver and pliers. Next, using a 10mm glow plug socket, begin unscrewing them carefully without applying excessive force.

Once the replacement glow plugs are inserted, tighten them using a torque wrench set to 10 Nm.


Updated on 13 June 2026 by ScegliAuto


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by ScegliAuto

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