Bmw Z4 Roadster 3.0si 2008 Bedienungsanleitung PDF herunterladen (Seite 78)

Things to remember when driving

76

pletely 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 87.

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.<

Moisture inside the vehicle

Make sure that the passenger compart-

ment does not become wet and that liq-

uids are transported in closed containers. Oth-

erwise, moisture could penetrate and damage

electronic components inside the vehicle.<

Use the parking brake on inclines

On inclines, keep the vehicle from rolling

by using the parking brake rather than by

slipping the clutch, which would lead to a high

degree of clutch wear.<

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 at the brake pedal combines with

sounds from the hydraulic circuits to indicate to

the driver that ABS is in its active mode.

Wet roads

When roads are wet or there is heavy rain,

briefly exert gentle pressure on the brake pedal

every few miles. Watch traffic conditions to

ensure that this maneuver does not endanger

other road users. The resulting heat dries the

brake rotors and brake pads. Immediate braking

force is then available if necessary.

Inclines

To prevent overheating and, as a result,

diminished braking effectiveness, drive

down long or steep downhill grades in the gear

that requires the least braking. Otherwise, even

light but consistent pedal 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 43.

Never drive with the clutch held down,

with the transmission in idle 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

Limited vehicle use, extended periods with the

vehicle parked or in storage, and operating con-

ditions in which braking is restricted to gentle,

low-pressure applications will all increase the

tendency for corrosion to form on the rotors and

contamination to accumulate on the brake

pads. This occurs because the minimal pres-

sure which must be exerted by the pads to

clean the rotors by brake applications is not

reached.

If the brake rotors are corroded, they will tend to

respond to braking with a pulsating effect which

even extended application will fail to cure.

Brake pads

The warning lamp lights up. The brake

pads have worn down to the minimum

safe limit. Have the brake pads

replaced as soon as possible.

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