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Mercedes air pump failure symptoms

What Are Common Mercedes-Benz Air Pump Issues and How to Fix Them?

Mercedes-Benz air pump failures often trigger check engine lights, rough idling, or failed emissions tests. Common causes include electrical faults, clogged valves, or worn diaphragms. Troubleshooting involves scanning for error codes, inspecting vacuum lines, and testing pump pressure. Repairs range …

What Are the Most Common Mercedes-Benz Air Pump Failures and Fixes

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The Mercedes-Benz air pump, or secondary air injection pump, reduces emissions during cold starts by injecting fresh air into the exhaust manifold. This accelerates catalytic converter heating, enabling faster conversion of harmful gases like CO and NOx. A malfunctioning pump …