P0456 on Your 2024 GLE: Quick Case
Your 2024 GLE (W167 refreshed) has flagged P0456—a very small EVAP leak. The M256 3.0L turbo inline-six (GLE 450) or M176 4.0L twin-turbo V8 (GLE 580/AMG) uses Mercedes's leak detection pump. Fully covered under 4yr/50k warranty through 2028.
Clues
- Check engine light on
- P0456 stored
- No drivability issues
- Fuel filler may have debris
Suspects
- Fuel Filler Seal (High Likelihood): Debris. $0 warranty.
- Leak Detection Pump (High Likelihood): Active detection. $0 warranty.
- Purge Valve (Medium Likelihood): Manufacturing variance. $0 warranty.
- Software Calibration (Low Likelihood): Detection sensitivity. $0 warranty update.
What to Do
- Clean fuel filler area
- Mercedes dealer appointment—covered through 2028
- Free warranty repair via STAR diagnostics
Cost
- Under warranty: $0
- 4yr/50k through 2028
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the engine, 4MATIC, air suspension, towing, or any feature.
Warranty
Mercedes-Benz 4yr/50k through 2028. Federal emissions 8yr/80k through 2032. Fully covered.