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Where can I find the relay for the secondary air pump in a 2011 Mercedes C300?
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★ Top Answer
In your 2011 Mercedes C300, you can find the secondary air injection fuse (F32) and relay (N10/1kP) on the third row from the bottom of the front SAM on the left side of the engine. The fuel pump relay plays a crucial role in your vehicle's fuel system, applying pressure a few seconds before oil pressure takes over upon ignition to help start the engine. Replacing a fuel pump relay usually costs around $25 for the part, and a mechanic might charge at least an hour's labor to do the job. If your vehicle is having trouble starting, it could be due to issues with the fuel pump or relay, as well as other potential ignition problems.
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The secondary air pump relay for the 2011 Mercedes C300 is located inside the primary fuse box.
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