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STARTING AND DRIVING
444
When driving short distances at low
speeds in a diesel car
The capacity of the diesel emission control sys-
tem is affected by how the car is driven. It is
important to drive varying distances at different
speeds to achieve optimal performance.
Driving short distances at low speeds (or in cold
climates) frequently, where the engine does not
reach normal operating temperature, can lead to
problems that can eventually cause a malfunction
and trigger a warning message. If the vehicle is
mostly driven in city traffic, it is important to regu-
larly drive at higher speeds to allow the diesel
emission control system to regenerate.
•
The car should be driven on A-roads at
speeds in excess of 60 km/h (38 mph) for at
least 20 minutes between each refuel.
Related information
•
Diesel (p. 442)
Economical driving
Drive economically and eco-consciously by driv-
ing smoothly, thinking ahead, and adjusting your
driving style and speed to the prevailing condi-
tions.
•
For lower fuel consumption, activate Eco
drive mode.
•
Use the Eco Coast
16
freewheel function -
engine braking will cease and the car's
kinetic energy can be used to freewheel for
longer distances.
•
Drive in the highest gear
17
possible, adapted
to the current traffic situation and road -
lower engine speeds result in lower fuel con-
sumption. Use the gear shift indicator.
•
Drive at a steady speed and keep a good dis-
tance to other vehicles and objects to mini-
mise braking.
•
High speed results in increased fuel con-
sumption - the wind resistance increases
with speed.
•
Drive with the correct air pressure in the
tyres and check this regularly - select ECO
tyre pressure for best results.
•
Choice of tyres can affect fuel consumption -
seek advice on suitable tyres from a dealer.
•
Remove unnecessary items from the car -
the greater the load the higher the consump-
tion.
•
Use engine braking to slow down, when it
can take place without risk to other road
users.
•
A roof load and space box increase wind
resistance, leading to higher consumption -
remove the load carriers when not in use.
•
Avoid driving with open windows.
WARNING
Never switch off the engine while moving,
such as downhill, this deactivates important
systems such as the power steering and
brake servo.
Related information
•
Drive mode ECO (p. 421)
•
Approved tyre pressures (p. 595)
•
Fuel consumption and CO2 emissions
(p. 590)
•
Drive-E - cleaner driving pleasure (p. 25)
16
See the section "Drive mode ECO".
17
Applies to driving with manual gear changing.
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