Staff Answer
Aug 21, 2026 - 01:45 PM
Fuel type compliance and engine performance preservation on the 2023 Mercedes S-Class are managed by fuel filler cap specification labels, high-compression engine requirements, and knock sensors.
How to Fix It:
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Check the Fuel Cap: Open the fuel door and read the label affixed to the inside of the gas cap to verify the required minimum octane rating (typically Premium Unleaded 91 AKI / 95 RON).
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Pump Recommended Fuel: Select the appropriate premium fuel grade at the gas station pump to prevent engine knocking and maintain optimal power output.
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Avoid Lower Octane: Refrain from using regular or sub-standard fuel grades for extended periods to protect the high-performance turbocharging system.
For detailed electrical schematics and sensor specs, check out the complete https://www.autouserguide.com/mercede...
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