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STARTING AND DRIVING
* Option/accessory.
309
The car should then be driven for approximately
20 minutes more.
NOTE
The following may arise during regeneration:
•
a smaller reduction of engine power may
be noticed temporarily
•
fuel consumption may increase temporar-
ily
•
a smell of burning may arise.
When regeneration is complete the warning text
is cleared automatically.
Use the parking heater* in cold weather - the
engine then reaches normal operating tempera-
ture more quickly.
IMPORTANT
If the filter is completely filled with particles, it
may be difficult to start the engine and the fil-
ter is non-functional. Then there is a risk that
the filter will need to be replaced.
Related information
•
Fuel - handling (p. 305)
•
Fuel - diesel (p. 307)
•
Fuel consumption and CO2 emissions
(p. 416)
•
Fuel tank - volume (p. 413)
Catalytic converters
The purpose of the catalytic converters is to
purify exhaust gases. They are located close to
the engine so that operating temperature is
reached quickly.
The catalytic converters consist of a monolith
(ceramic or metal) with channels. The channel
walls are lined with a thin layer of platinum/
rhodium/palladium. These metals act as cata-
lysts, i.e. they participate in and accelerate a
chemical reaction without being used up them-
selves.
Lambda-sond
TM
oxygen sensor
The Lambda-sond is part of a control system
intended to reduce emissions and improve fuel
economy. For more information, see Fuel con-
sumption and CO2 emissions (p. 416).
An oxygen sensor monitors the oxygen content
of the exhaust gases leaving the engine. This
value is fed into an electronic system that contin-
uously controls the injectors. The ratio of fuel to
air directed to the engine is continuously
adjusted. These adjustments create optimal con-
ditions for efficient combustion, and together with
the three-way catalytic converter reduce harmful
emissions (hydrocarbons, carbon monoxide and
nitrous oxides).
Related information
•
Fuel - petrol (p. 306)
•
Fuel - diesel (p. 307)
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