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How to Replace the Glow Plugs in a Mercedes ML?

Model: Mercedes Classe M W163 - Years 1997-2005
Part: Glow plugs

In this tutorial, see how to replace the glow plugs in a Mercedes ML. This is a straightforward operation but requires some skill. Start by opening the engine bay, then locate all the glow plugs. Apply some penetrating spray and wait a few minutes. Next, disconnect the various connectors and hoses indicated, grip the first glow plug with a 10mm spanner and unscrew it, avoiding excessive force. Once removed, insert the replacement, tighten it with a torque wrench set to 15 Nm, and repeat the process for the remaining glow plugs.

Updated on 27 June 2026 by ScegliAuto

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