P0456 on MERCEDES-BENZ C-CLASS
What P0456 Means on Your MERCEDES-BENZ C-CLASS
Real MERCEDES-BENZ C-CLASS Owner Reports (Source: NHTSA Complaints Database)
"My engine light jeep coming on with a p0456 code. replace gas cap and purge valve control less then year ago. however i still smell gas when i fill up tank. after it goes down to 3/4 tank i don't smell gas. when it drop below half tank the engine light comes on."
"When fuel tank is about 75%-100% full, the car will smell heavily of gasoline inside and around the rear of the vehicle. upon inspection, fuel pump cover/cap seems to be cracked and leaking fuel. engine code p0456."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0456 on MERCEDES-BENZ C-CLASS
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.