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Replacing Spark Plugs on Mercedes C-Class

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

Open the hood and insert the support rod. Remove the outermost part (let's say the front) of the engine cover: it is simply held in place by four clips, so just shake it a bit to pull it out. Remove the two side ducts by loosening them slightly and pulling them off, as shown in the video. This will allow you to remove the rest of the engine cover. Disconnect the spark plug connectors. Using a T30 Torx wrench, remove the screws that secure the box connected to the spark plugs, then use a 16 mm socket to remove the spark plugs.

Updated on 2 April 2026 by ScegliAuto

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