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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.
Mobile communication equipment
BMW advises against the use of mobile
communication equipment such as
mobile phones inside the car, unless they are
directly connected to an outside aerial. Mutual
interference between the car's electronics and
such equipment cannot be entirely ruled out.
There is moreover no guarantee that the radia-
tion generated when such devices are transmit-
ting will be dissipated out of the car's interior.<
Inside and outside mirrors,
automatic-dim*
There are two photo-cells in the inside mirror
for this purpose. One photo-cell is in the mirror
glass, the other slightly offset on the back of the
mirror.
In order to ensure that the system functions
correctly, keep the photo-cells clean, do not
cover the area between the inside mirror and
windscreen, and do not affix adhesive labels or
stickers of any kind to the windscreen directly in
front of the mirror.
Aquaplaning
When driving on wet or slushy surfaces,
reduce speed to prevent a wedge of water
forming between the tyre and the road. This sit-
uation, known as aquaplaning, means that the
tyre can actually lose contact completely with
the road surface, so that neither can the car be
steered nor the brakes be properly applied.<
The risk of aquaplaning increases along with
declining tread depth on the tyres, see also
Minimum tread depth on page 182.
Wading
Drive through water only to a max. depth
of 30 cm, approx. 1 ft, and no faster than
walking pace, otherwise the engine, electrical
system and transmission may be damaged.<
Use of the handbrake on uphill
gradients
Never try to prevent the car rolling back
on an uphill gradient by slipping the
clutch; always apply the handbrake. The clutch
will otherwise wear rapidly.<
Sequential Manual Gearbox SMG
Drive off quickly when moving off on an
uphill gradient. Do not use the accelerator
to prevent the car rolling back down a slope;
apply the handbrake, to avoid causing the gear-
box to overheat.<
Starting assistance
The starting assistance enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the handbrake for this.
1. Hold the car in place by pressing the foot-
brake.
2. Release the footbrake and drive off without
delay.
The starting assistance holds the car for
about 2 seconds after the footbrake has
been released. Depending on the car's load or if
a trailer is being towed, it could roll back slightly
during this period. After releasing the footbrake,
move off swiftly straight away, as the starting
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