Driving and the Environment 181
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Never run the fuel tank completely empty.
Driving in an economical and environmentally
conscious manner
Do not switch off the ignition while you are driving the vehicle.
Do not pour too much oil into the engine ⇒ꢀpage 200, Replenishing engine oil.
General
If you drive your vehicle in a country in which unleaded petrol is not available, you
must have the catalytic converter replaced later when driving the vehicle into a
country in which use of a catalytic converter is mandatory.
Your personal style of driving is a major factor.
Your fuel consumption, any pollution of the environmental and the wear-and-tear
to the engine, brakes and tyres, depend essentially on three factors:
WARNING
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In view of the high temperatures which may be produced in the catalytic
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your personal style of driving,
the conditions under which your vehicle is operated,
technical aspects.
converter, one should always park a vehicle in such a way that the catalytic
converter cannot come into contact with easily flammable materials below the
vehicle - a risk of fire!
You can easily improve your fuel economy by 10 - 15 percent by driving in an eco-
nomical way with foresight. This section is intended to provide you with a number
of tips on how to protect the environment and at the same time save money.
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Never use additional underbody protection or corrosion-protection agents
for the exhaust pipes, catalytic converters or heat shields. Such substances
might ignite when driving - risk of fire!
The fuel consumption can naturally also be influenced by factors which are be-
yond the driver's control. It is, for example, normal for the fuel consumption to in-
crease in winter and under worsened conditions such as poor road conditions,
towing a trailer, etc.
CAUTION
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On vehicles fitted with a catalytic converter, never let the fuel tank run com-
pletely empty. An irregular fuel supply can result in poor ignition or misfiring. Un-
burnt fuel may get into the exhaust system and damage the catalytic converter.
The technical requirements for low fuel usage and economic efficiency of the ve-
hicle have already been built into the vehicle at the works. Special attention has
been given to minimising negative effects on the environment. It is necessary to
take note of the guidelines given in this chapter in order to make best use of
these characteristics and to maintain their effectiveness.
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Filling the tank even only once with leaded petrol will result in the catalytic
converter being destroyed.
If you detect a power reduction or irregular engine running when driving, re-
duce your speed immediately and have the vehicle inspected by the nearest spe-
cialist garage. The symptoms described may be caused by a fault in the ignition
system. Unburnt fuel may get into the exhaust system and damage the catalytic
converter.
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The optimal engine speed should be obtained when accelerating, in order to avoid
a high fuel consumption and resonance of the vehicle.
Looking ahead when driving
For the sake of the environment
Even if the exhaust system is operating properly, a sulphur-like exhaust odour
may be produced under certain operating conditions of the engine. This depends
on the sulphur content of the fuel. It is often sufficient to refuel with unleaded
premium-grade petrol of a different brand or at a different filling station.
A vehicle's highest fuel consumption occurs it accelerates.
Avoid accelerating and braking unnecessarily. If you drive with forsight you will
not need to brake so often and will also then not have to accelerate so much. Let
your vehicle coast to a stop, for example, if this is possible, when you see that the
next set of traffic lights is at red.
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical data