How can I diagnose engine sputtering issues in my Mercedes-Benz S-Class in Pakistan?

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How can I diagnose engine sputtering issues in my Mercedes-Benz S-Class in Pakistan?

I’m experiencing engine sputtering in my Mercedes-Benz S-Class and want to understand how to diagnose the problem. What are the typical checks o r tests I should perform, and are there any common sensors o r parts that often cause sputtering in Pakistan’s driving environment?

Talha Kyanii asked on 11 Oct 2025 16:29:42 pm

1 Answer

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Gari Master - on 11 Oct 2025 16:30:37 pm

To diagnose engine sputtering:

Check for Error Codes: Use an OBD-II scanner to read engine trouble codes that can pinpoint sensor o r system failures.

Inspect Spark Plugs and Coils: Look for signs of wear, fouling, o r damage and replace if necessary.

Fuel System Inspection: Have the fuel injectors tested and cleaned if clogged.

Air Filter Check: Ensure the air filter is clean and replaced regularly.

Look for Vacuum Leaks: Inspect hoses for cracks o r disconnections.

Sensor Testing: Have the mass airflow sensor, oxygen sensors, and throttle position sensor checked for proper function.