BMW E87 2009, Руководство пользователя, Страница: 102 / 248

Driv
ing precautions
100
Diesel particle filter*
The diesel particle filter collects soot particles
and burns them periodically at high tempera-
tures. This cleaning procedure takes several
minutes. Under some circumstances, you may
notice it by the fact that the engine temporarily
runs more roughly and requires a higher engine
speed for normal power development. In addi-
tion, the exhaust may cause some noise and
emit a small amount of smoke, even after the
engine has been switched off.
Aquaplaning
When driving on wet or slushy surfaces,
reduce speed to prevent a wedge of water
from forming between the tyre and the road.
This situation, known as aquaplaning, means
that the tyre can actually lose contact com-
pletely with the road surface, so that neither the
car can be steered nor the brake be properly
applied.
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The risk of aquaplaning increases with declin-
ing tread depth on the tyres, see also Minimum
tread depth on page
182 .
Driving through water
Drive through water only to a max. depth
of 30 cm or 12 in, and no faster than walk-
ing pace, otherwise the engine, electrical sys-
tem and transmission may be damaged.
<
Apply the handbrake on uphill
gradients
Never try to prevent the car from rolling
back on an uphill gradient by slipping the
clutch for a longer period; always apply the
handbrake. The clutch will otherwise wear rap-
idly.
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In the 130i, the drive-off assistant also provides
support, see page
73 .
Safe braking
Your BMW is equipped with ABS as standard.
Applying the brakes fully is the most effective
way of braking in situations in which this is nec-
essary. Since the car remains steerable, you
can avoid obstacles by turning the steering
wheel as smoothly as possible.
The pulsating sensation at the brake pedal,
combined with the sound of the hydraulic sys-
tem operating, indicates that ABS is interven-
ing.
Wet roads
In damp weather or heavy rain, apply the brakes
briefly with light pedal pressure every few kilo-
metres/miles. When doing so, make sure that
no other road user is hindered. The resulting
heat dries the brake discs and pads. The brak-
ing force will then be available immediately if
needed.
Downhill gradients
To avoid impairing the efficiency of the
brake system as a result of overheating,
drive down long or steep descents in the gear
that allows you to keep brake applications to a
minimum. Otherwise even slight but continu-
ous pressure on the brake could cause over-
heating, brake pad wear or even brake system
failure.
<
You can increase the engine's braking effect by
shifting down through the gears all the way to
first gear, if necessary. This avoids overburden-
ing the brakes. Downshifting in manual mode of
the automatic transmission, see page
53 .
Never drive with the clutch held down,
with the transmission in neutral or with
the engine switched off; engine braking action
will not be present, or there will be no power
assistance to the brakes or steering.
Make sure that pedal functions are not impaired
by floor mats, carpets or other objects.
<
Corrosion of brake discs
If the car is used for short distances only, is
parked for lengthy periods or subjected to only
minor loads, the brake discs will be particularly
susceptible to corrosion and the brake pads will
collect dirt; this is because the brake pressure
necessary for a self-cleaning effect is not gen-
erated.
Online Edition for Part no. 01 41 2 602 816 - © 08/09 BMW AG Online Edition for Part no. 01 41 2 602 816 - © 08/09 BMW AG