P0455 on Your 2024 Mercedes-Benz C-Class
A P0455 on your 2024 C-Class (W206) means the ECU detected a large EVAP leak. Whether you have the C300 (2.0L turbo) or AMG C43 (2.0L turbo with electric assist), your Mercedes is fully under warranty. Check the gas cap first.
Symptoms
- Check engine light (yellow engine icon on dash)
- P0455 stored in ECU
- Possible fuel smell
- Gas cap not seating
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- EVAP Purge Valve (Medium Likelihood): Mercedes purge valve. Warranty-covered.
- Leak Detection Pump (Medium Likelihood): Mercedes LDP module. Warranty-covered.
- Fuel Tank Vent Valve (Low Likelihood): Factory defect. Warranty-covered.
- ECU Software (Low Likelihood): Calibration update. Warranty-covered.
Mercedes EVAP Note
Mercedes-Benz, like BMW, uses a Leak Detection Pump for EVAP testing. The system is integrated with XENTRY diagnostics at the dealer.
Warranty
Your 2024 C-Class is covered by Mercedes-Benz's 4-year/50,000-mile warranty through 2028. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect turbo performance, 4MATIC, or any features.