Activated charcoal canister, component description - GF47.30-P-2010V

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 203 with ENGINE 272.920

MODEL 211 with ENGINE 272.922

MODEL 203, 209 with ENGINE 272.940

MODEL 203 with ENGINE 272.941

MODEL 171 with ENGINE 272.942

MODEL 211 with ENGINE 272.943

MODEL 211 with ENGINE 272.944

MODEL 251 with ENGINE 272.945

MODEL 221 with ENGINE 272.946

MODEL 203, 209 with ENGINE 272.960

MODEL 171 with ENGINE 272.963

MODEL 211, 219 with ENGINE 272.964

MODEL 221 with ENGINE 272.965

MODEL 230 with ENGINE 272.966

MODEL 164, 251 with ENGINE 272.967

MODEL 203 with ENGINE 272.970

MODEL 211 with ENGINE 272.972

MODEL 221 with ENGINE 272.975

MODEL 221 with ENGINE 273.922

MODEL 164 with ENGINE 273.923

MODEL 221 with ENGINE 273.924

MODEL 164 with ENGINE 273.943

MODEL 211, 219 with ENGINE 273.960

MODEL 216, 221 with ENGINE 273.961

MODEL 211 with ENGINE 273.962

MODEL 164, 251 with ENGINE 273.963

MODEL 230 with ENGINE 273.965

MODEL 209 with ENGINE 273.967

MODEL 221 with ENGINE 273.968

Fig 1: Identifying Activated Charcoal Canister - Shows Model 211

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

Model 203, 209, 211, 219, 221, 164, 251, 230: in rear right wheelhouse
Model 171: at frame floor under fuel tank.

Task

Temporarily storing fuel vapors
Ventilation and purging of fuel tank.

Design

The activated charcoal canister consists of a plastic housing filled with activated charcoal granulates.

The activated charcoal canister is divided into various chambers by partitions to achieve an optimal flow of the activated charcoal granulates.

The activated charcoal canister is larger (contents approx. 3.5 liter, usually approx. 1.5 liter), filled with a different activated charcoal and equipped with the activated charcoal canister shutoff valve.

Shows model 171

Function

The fuel vapors released from the fuel tank ( also when refueling) are bonded to the activated charcoal. When purging is activated, they are drawn in again by the engine and combusted.

The activated charcoal is completely regenerated in the ideal case.

The ventilation of the fuel tank (under vacuum) and the de-ventilation of the fuel tank (at excess pressure) take place through the activated charcoal canister.

Fig 2: Activated Charcoal Canister Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Design

Housing filled with activated charcoal granulate. Divided into different chambers by intermediate walls in order to achieve optimal flow through the activated charcoal.

with ORVR: Quantities of around 2.7 to 3.5 l

Function

The fuel vapors released from the fuel tank ( with ORVR or when refueling) are bonded to the activated charcoal. When purging is activated, they are drawn in again by the engine and combusted.

The activated charcoal is completely regenerated in the ideal case. The pressurization and depressurization of the fuel tank is performed via the activated charcoal canister.