Solving P0455 on Your 2022 Mercedes-Benz E-Class
A P0455 on your 2022 E-Class (W213) signals a large EVAP leak. Whether you have the E350 or E450, the diagnostic approach starts the same—gas cap. Your Mercedes is likely under warranty.
Evidence
- Check engine light on
- P0455 stored in ECU
- Possible fuel smell
- Gas cap not clicking
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$35.
- Leak Detection Pump (Medium Likelihood): Mercedes LDP. $300–$520 installed.
- EVAP Purge Valve (Medium Likelihood): Sticking. $220–$420 installed.
- Fuel Tank Vent Valve (Low-Medium Likelihood): Seal failure. $240–$440 installed.
- Vapor Hose (Low Likelihood): Connection issue. $120–$300.
Diagnosis
Gas cap first. If P0455 persists, XENTRY diagnostics at the dealer will find the exact fault.
Warranty
Your 2022 E-Class is likely under Mercedes' 4-year/50,000-mile warranty through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 is vapor only. All performance and luxury features unaffected.