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How to Replace Glow Plugs in a Mercedes C-Class?

Model: Mercedes Classe C W203 - Years 2000-2007
Part: Glow plugs

In this tutorial, you will see how to replace the glow plugs in a Mercedes C-Class, a very simple operation. Before proceeding, ensure the engine is cool enough. Start by opening the hood, then remove the upper plastic cover and locate the glow plugs on your right. Next, disconnect the connectors, clean any residue in the area, and using a long 10mm wrench, gently unscrew the first glow plug. At this point, you can install the replacement, tighten it, and repeat the process for the remaining glow plugs.

Updated on 24 August 2026 by ScegliAuto

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