Exhaust Gas Purification System - Seat Leon 2010 Owner's Manual

192 Driving and the environment
WARNING (continued)
your vehicle has automatic transmission). This makes use of engine
braking and relieves the brakes.
•
Never let the brakes "slip" by applying light pressure. Continuous
braking will cause the brakes to overheat and the braking distance will
increase. Apply and then release the brakes alternately.
•
Never let the vehicle run with the engine switched off. The braking
distance is increased considerably when the brake servo is not active.
•
Very heavy use of the brakes may cause a vapour lock if the brake fluid
is left in the system for too long. This impairs the braking effect.
•
Non-standard or damaged front spoilers could restrict the airflow to the
brakes and cause them to overheat. Before purchasing accessories please
observe the relevant ⇒ page 209, "Technical modifications" instructions.
•
If a brake circuit fails, the braking distance will be increased consider-
ably. Contact a qualified workshop immediately and avoid unnecessary
journeys.

Exhaust gas purification system

Catalytic converter*
To conserve the useful life of the catalytic converter
– Always use unleaded petrol.
– Do not let the fuel get too low in the tank.
– For engine oil changes, do not replenish with too much engine oil
⇒ page 223, "Topping up engine oil
– Never tow the vehicle to start it, use jump leads if necessary
If you notice misfiring, uneven running or loss of power when the vehicle is
moving, reduce speed immediately and have the vehicle inspected at the
nearest qualified workshop. In general, the exhaust gas warning lamp will
light up when any of the described symptoms occur ⇒ page 77. If this
happens, unburnt fuel can enter the exhaust system and escape into the envi-
ronment. The catalytic converter can also be damaged by overheating.
The catalytic converter reaches very high temperatures! Fire hazard!
•
dry grass or inflammable materials under the vehicle.
•
exhaust pipes, catalytic converter or the heat shields on the exhaust
system. These materials could catch fire when the vehicle is being driven.
Never fully drain the fuel tank because the irregularity of the fuel supply may
cause ignition problems. This allows unburnt fuel to enter the exhaust
system, which could cause overheating and damage the catalytic converter.
Even when the emission control system is working perfectly, there may be a
smell of sulphur from the exhaust gas under some conditions. This depends
on the sulphur content of the fuel used. Quite often the problem can be
solved by changing to another brand of fuel.
".
⇒ page 264.
WARNING
Never park where the catalytic converter could come into contact with
Do not apply additional underseal or anti-corrosion coatings to the
Caution
For the sake of the environment