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Frequently asked questions about cars and motorcycles

How to Replace Spark Plugs on a Mercedes A-Class

Model: Mercedes Classe A W168 - Years 1997-2004
Part: Glow plugs

Release the hood from the latch and lift it to secure it with the prop rod. Then locate the spark plugs, which are positioned under the engine's intake manifold. Next, remove the bolts securing the injector rail and disconnect the connectors attached to it. Remove the rail, and now you can use a socket wrench to unscrew the spark plugs located at the bottom of each cylinder where the injectors were. Finally, retrace the steps in reverse to reassemble the various components.

Updated on 26 February 2026 by ScegliAuto

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