BMW 2005 645Ci Convertible Manual Do Proprietário

 109

BMW advises against using mobile com-
munication devices, e.g. portable phones, 

inside the vehicle without a direct connection to 
an external antenna. Otherwise, the vehicle 
electronics and mobile communication device 
can influence one another. In addition, there is 
no assurance that the radiation emitted during 
transmission will be conveyed out of the vehicle 
interior.

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When driving on wet or slushy roads, 
reduce road speed. If you do not, a wedge 

of water can form between tires and road sur-
face. This phenomenon is referred to as hydro-
planing, and is characterized by a partial or 
complete loss of contact between the tires and 
the road surface, ultimately undermining your 
ability to steer and brake the vehicle.

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The risk of hydroplaning increases as the tread 
depth of the tires decreases, also refer to Mini-
mum tire tread on page

Do not drive through water on the road if it 
is deeper than 1 ft/30 cm, and then only at 

walking speed at the most. Otherwise, the vehi-
cle's engine, the electrical systems and the 
transmission may be damaged.

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On inclines, do not hold the vehicle with 
the clutch; use the handbrake. Otherwise 

greater clutch wear will result.

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Start off quickly on slopes. Do not hold 
the vehicle on a hill by applying the throt-

tle, but engage the handbrake instead. Other-
wise overheating can occur in the transmission 
region.

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Your BMW is equipped with ABS as standard. In 
situations that require it, it is best to brake with 
full force. Since the vehicle maintains steering 
responsiveness, you can still avoid possible 
obstacles with a minimum of steering effort.
Pulsation at the brake pedal combines with 
sounds from the hydraulic circuits to indicate to 
the driver that ABS is in its active mode.

Do not drive with your foot resting on the 
brake pedal. Even light but consistent 

pedal pressure can lead to high temperatures, 
brake wear and possibly even brake failure.

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When driving on wet roads or in heavy rain, 
briefly brake with light pedal pressure at inter-
vals of a few miles. Monitor traffic conditions to 
ensure that this maneuver does not endanger 
other road users. The heat generated in this 
process helps dry the pads and rotors to ensure 
that full braking efficiency will then be available 
when you need it.

To prevent overheating and thus reduced 
efficiency of the brake system, downshift 

to a gear in which only minimal brake applica-
tions are needed when descending long or 
steep downhill stretches. Even light but consis-
tent pedal pressure can lead to high tempera-
tures, brake wear and possibly even brake fail-
ure.

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You can further enhance the engine's braking 
effect by selecting a lower gear in the automatic 
transmission's manual mode, downshifting as 
far as first gear on extremely steep stretches, 
refer to page

. This strategy helps you avoid 

placing excessive loads on the brake system.

Never drive with the clutch pressed 
or allow the vehicle to coast with the 

transmission in Neutral – or with the engine 
switched off – there is no engine braking when 
the transmission is in Neutral, and no power 
assist for brakes and steering when the engine 
is not running.

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