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On average, the cost for a Mercedes-Benz R500 Evaporative Emission Control Canister Replacement is $590 with $495 for parts and $95 for labor. Prices may vary depending on your location.
Have you ever been around a vintage or classic car that emanated a raw fuel odor, yet no leaks were apparent? Gasoline vapors are very harmful if inhaled; they contain damaging chemicals such as benzene and toluene, which can cause headaches, nausea, and breathing problems. Vehicle manufacturers are required to limit the amount of fuel vapors that can be emitted from a vehicle. The evaporative emissions system consists of a charcoal canister, valves, hoses and a sealed fuel cap.
When fuel vapors are produced inside the fuel tank due to evaporation, they are collected inside the charcoal canister, or evaporative emission control canister. At a time determined by the engine control module, the fumes collected in the charcoal canister are purged through a valve and sent into the engine to burn as part of the air/fuel mixture. Dust and dirt from regular driving conditions can accumulate on the emission control canister, causing the purge and vent solenoids or valves to fail. It is also possible for the charcoal canister itself to crack either due to impact or harsh environmental conditions. When this happens, raw fuel or fuel vapors are lost into the environment around your vehicle, and a noticeable fuel smell can occur.
Though regular maintenance or scheduled replacement is not necessary, the charcoal canister can become clogged from moisture or contaminants in the fuel. If the charcoal canister is damaged and leaking, or if a diagnosis determines the charcoal canister or one of its components is responsible for a Check Engine light illuminating, have the evaporative emission control canister replaced by one of our expert mechanics.
If the evaporative emission control canister is not replaced when it is diagnosed, other problems with your vehicle may go undetected as the Check Engine light will illuminate for dozens of other reasons. Because fuel vapors are dangerous to inhale, and a fuel leak can cause a fire, you should replace the charcoal canister as soon as possible.
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