Bmw 328i xDrive Sports Wagon 2009 Bedienungsanleitung PDF herunterladen (Seite 118)

Things to remember when driving

116

of smoke may emerge from the exhaust, even

for a short period after the engine is switched

off.

Hydroplaning

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 situation, known as hydroplaning,

means that the tire can completely lose contact

with the road surface, so that neither the car can

be steered nor the brake be properly applied.<

The risk of hydroplaning increases with declin-

ing tread depth on the tires, refer also to Mini-

mum tread depth on page 208.

Driving through water

Drive through water on the road only if it is

not deeper than 1 ft/30 cm, and then only

at walking speed at the most. Otherwise, the

vehicle's engine, the electrical systems and the

transmission may be damaged.<

Use the parking brake on inclines

On inclines, do not hold the vehicle for a

lengthy period using the clutch; use the

parking brake instead. Otherwise greater clutch

wear will result.<

For more information about the drive-off assis-

tant, refer to page 83.

Braking safely

Your BMW is equipped with ABS as a standard

feature. Applying the brakes fully is the most

effective way of braking in situations in which

this is necessary. Since the vehicle maintains

steering responsiveness, you can still avoid

possible obstacles with a minimum of steering

effort.

Pulsation of the brake pedal, combined with

sounds from the hydraulic circuits, indicate that

ABS is in its active mode.

Driving in wet conditions

When roads are wet or there is heavy rain,

briefly exert gentle pressure on the brake pedal

every 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. Full

braking efficiency will then be available when

you need it.

Hills

To prevent overheating and the resulting

reduced efficiency of the brake system,

drive long or steep downhill gradients in the

gear in which the least braking is required. Even

light but consistent brake pressure can lead to

high temperatures, brake wear and possibly

even brake failure.<

You can increase the engine's braking effect by

shifting down, all the way to first gear if neces-

sary. This strategy helps you avoid placing

excessive loads on the brake system. Down-

shifting in manual mode of the automatic trans-

mission, refer to page 56.

Never drive with the clutch held down,

with the transmission in neutral or with

the engine switched off; otherwise, engine

braking action will not be present or there will be

no power assistance to the brakes or steering.

Never allow floor mats, carpets or any other

objects to protrude into the area around the

pedals, otherwise pedal function could be

impaired.<

Corrosion on brake rotors

When the vehicle is driven only occasionally,

during extended periods when the vehicle is not

used at all, and in operating conditions where

brake applications are less frequent, there is an

increased tendency for corrosion to form on

rotors, while contaminants accumulate on the

brake pads. This occurs because the minimum

pressure which must be exerted by the pads

during brake applications to clean the rotors is

not reached.

Should corrosion form on the brake rotors, the

brakes will tend to respond with a pulsating

effect that even extended application will fail to

cure.

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