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How to Replace the Spark Plugs in a Mercedes A-Class

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

Release the hood from the designated lever, then lift it and secure it with the appropriate prop. Now, you need to remove the entire injection block located under the engine's intake manifold. You can extract it by gently prying with a screwdriver to release it from its housing. This way, you can remove the bolts securing the entire injector block. Extract it, and with a socket wrench, you can remove the spark plugs located in each cylinder you have freed. Then, install the new spark plugs and retrace the steps described in reverse.

Updated on 26 February 2026 by ScegliAuto

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