S 55 AMG (220.173) V8-5.5L (113.982) (2001)
Note: Ending refueling when the refueling nozzle switches off and the fuel tank is full! On no account overfilling fuel tank as a result of refueling
nozzle being switched on several times.
Function
The fuel vapors are recovered at the filler neck (45) and passed along a ventilation hose (a) to the activated charcoal canister. An insert inserted in the
filler neck prevents, that when refueling fuel flows to the activated charcoal canister.To do this the fuel vapors in the filler neck are diverted several
times in order to separate the gases from the fuel. The connection to the activated charcoal canister is shut off by a flap (45/1) when driving. It is
opened by the gasoline pump nozzle when refueling.
Additional measures if fuel tank is overfilled
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If the fuel tank is full, the float (45/2) closes with flap the filler neck below. This ensures that the refueling nozzle shuts off more rapidly and
overfilling is largely prevented.
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A too high level of fuel in the filler neck presses open the pressure relief valve (45/4). Fuel flows to atmosphere at the nozzle. End refueling! On
nozzles fitted with rubber boot (B) this overflowing is no longer recognizable.
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A too high pressure in the ORVR vent line (a) acts on the diaphragm in the pressure relief valve (82). If the diaphragm lifts off because of
excessively high pressure, the pressure is released at the fuel tank recess (e) and below the wheelhouse to atmosphere (c). End refueling!
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If the pressure is too high in the activated charcoal canister (77), the pressure relief valve (77/1) opens. The pressure is reduced through the
activated charcoal canister shutoff valve (Y58/4) to atmosphere (c).
As of 01.Sept.00
On-Board Refueling Vapor Recovery Function
MODEL 170 as of 1.9.00 with ENGINE 111, 112 (except , 112.96) with CODE (494a) USA version
MODEL 202 with ENGINE 111, 112
with CODE (494a) USA version
with CODE (808) Model year 1998
with CODE (809) Model year 1999
with CODE (800) Model year 2000
MODEL 203 with ENGINE 111, 112 (except, 112.96) with CODE (494a) USA version
MODEL 208 with ENGINE 111, 112, 113
with CODE (494a) USA version
with CODE (808) Model year 1998
with CODE (809) Model year 1999
with CODE (800) Model year 2000
with CODE (801) Model year 2001
with CODE (802) Model year 2002
MODEL 209 with ENGINE 112 ,113 with CODE (494a) USA version
MODEL 210.0 as of 1.6.01 with ENGINE 112, 113 with CODE (494a) USA version
MODEL 211 with ENGINE 112, 113 (except, 113.99) with CODE (494a) USA version
MODEL 215 as of 1.9.00 with ENGINE 113, 137, 275 (except 113.99) with CODE (494a) USA version
MODEL 220 as of 1.9.00 with ENGINE 112, 113, 137 (except 113.99) with CODE (494a) USA version
MODEL 230 with ENGINE 112, 113 (except, 113.99) with CODE (494a) USA version