1998 BMW CONVERTIBLE winter tires

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Page 12 of 179

BMW CONVERTIBLE 1998 Owners Manual
11

Contents

Controls and features
Care and maintenance

Lamps:

Parking lamps/low beams85
Instrument panel lighting85
Foglamps86
Interior lamps86
Reading lamps86

An inviting climate:

Heate

Page 100 of 179

BMW CONVERTIBLE 1998 Owners Manual At a glance
Controls and featuresCare and maintenanceAdvanced technology
Technical data
Owner service procedure
At a glanceControlsCar careRepairsTechnicalDataIndex
Index
99
Special operating instruct

Page 104 of 179

BMW CONVERTIBLE 1998 Owners Manual 10 3
At a glanceControlsCar careRepairsTechnicalDataIndex
ABS enhances active safety by helping
to prevent the wheels from locking under
braking. When the front wheels slide, the
driver loses steer

10 3
At a glanceControlsCar careRepairsTechnicalDataIndex
ABS enhances active safety by helping
to prevent the wheels from locking under
braking. When the front wheels slide, the
driver loses steering control over the
vehicle. Traction loss at the rear wheels
can cause the rear end to break into
uncontrolled oversteer.
ABS is designed to meet two essential
requirements during every application:
dto help provide vehicle stability on all
types of road surface (asphalt,
cement, dirt, moisture, snow and ice).
dto help to retain steering and maneu-
vering capability under the same con-
ditions.
However, certain important consider-
ations must be borne in mind in connec-
tion with these requirements:
Not even ABS can suspend the normal
laws of physics. ABS alone can not pre-
vent accidents when the brakes are
applied without an adequate safety
interval between vehicles, when the car
reaches excessive rates of lateral accel-
eration in curves, or if aquaplaning
occurs. Responsibility for these types of
situations remains in the hands (and feet)
of the driver. You should never allow the
added safety of ABS to lull you into a
false sense of security, or mislead you
into taking increased risks that could
affect your own safety and that of others.
Driving with ABSThe yellow ABS warning in the instru-
ment panel goes out as soon as the
engine is started.
The system becomes operative once the
vehicle exceeds a speed of 5 mph
(8 km/h). The ABS is deactivated when-
ever the vehicle's speed drops below
approx. 2 mph (3 km/h). This means that
the wheels can lock in the Þnal phase of
a braking action - a factor of no signiÞ-
cance in actual practice.
The ABS system closed-loop control cir-
cuit cycles in fractions of a second. A
pulsation at the brake pedal indicates to
the driver that ABS is active, that is, that
the car is within its maximum braking
range. In addition, the audible pulsation
that accompanies the control operation
calls your attention to the reduced trac-
tion between tires and road surface
(marginal adhesion), and reminds you
that the vehicle's speed should be
reduced to adapt to road conditions.On road surfaces featuring a loose top
layer on a Þrmer substratum, e.g., on
gravel or snow, the braking distances
with ABS may be longer than with the
wheels locked. However, ABS continues
to provide enhanced vehicle and steer-
ing control under these conditions.
a
To ensure that the system remains
completely operational, never modify the
ABS. Service procedures on ABS are to
be performed by authorized technicians
only.c
ABS may fail to function with maximum
efÞciency when tires of different sizes
are mounted (e.g., winter tires/spare tire;
remount the correct tires at all wheels as
soon as possible).
In the event of a fault, the ABS warning
lamp in the instrument cluster lights up,
refer to page 18. The braking system
then reverts to conventional operation as
on a vehicle without ABS. However,
have the brake system checked by your
BMW Retailer as soon as possible. To
prevent undetected defects and cumu-
lative faults from adversely affecting the
brake system, refer any problems to
your authorized BMW Retailer at the
earliest opportunity.
Antilock Brake System (ABS)

Page 106 of 179

BMW CONVERTIBLE 1998 Owners Manual 10 5
At a glanceControlsCar careRepairsTechnicalDataIndex
Failure of one brake circuitPedal travel increases, more pressure is
required at the pedal.
The remaining circuit continues to pro-
vide good

10 5
At a glanceControlsCar careRepairsTechnicalDataIndex
Failure of one brake circuitPedal travel increases, more pressure is
required at the pedal.
The remaining circuit continues to pro-
vide good braking response.a
In the event of any malfunction in
the brake system, consult the nearest
BMW Retailer as soon as possible.cThe onset of winter is often accompa-
nied by rapid changes in weather.
Adaptations in driving style should be
accompanied by preparations on the
vehicle itself to ensure that your
progress through the winter remains
safe and trouble-free.
CoolantEnsure that the coolant contains the
year-round 50:50 ratio of water and
antifreeze with corrosion inhibitor. This
mixture provides protection against
freezing down to approximately -345F
(-376). Replace the coolant every
three years.Lockscan be made operative again using
BMW lock de-icer. This de-icer also
contains lubricants.
In addition, a treatment with BMW lock
cylinder grease is recommended.Rubber seals and components To prevent the weather-stripping from
freezing, apply a spray-on rubber treat-
ment or silicone spray to the door, hood
and luggage compartment lid seals.b
A complete range of car-care
products is available from any autho-
rized BMW Retailer.c
Snow chainsBMW snow chains
* can be mounted on
both summer and winter tires. Mount
them in pairs on the rear wheels only
and observe the manufacturer's safety
precautions. Do not exceed a maximum
speed of 30 mph (50 km/h). For maxi-
mum traction, deactivate ASC+T when
driving with snow chains mounted, refer
to page 84.
Starting offWhen driving off in deep snow or "rock-
ing" the vehicle to free it, you should
switch off ASC+T, refer to page 84. Driving on low-traction road
surfacesOperate the accelerator pedal sensi-
tively, avoid high engine speeds and
shift up to the next-higher gear early.
Shift down into the next lowest gear
when approaching uphill or downhill
grades. Maintain an adequate distance
between yourself and the car ahead.
Brake system Winter driving

Page 107 of 179

BMW CONVERTIBLE 1998 Owners Manual 10 6
BrakesWinter road conditions substantially
reduce the amount of traction available
between the tires and the road surface;
the resulting - considerable - increases
in braking distance should

Page 114 of 179

BMW CONVERTIBLE 1998 Owners Manual 11 3
At a glanceControlsCar careRepairsTechnicalDataIndex
Tires and wheelsUse only BMW-approved tires.
Due to the high speeds which this vehi-
cle can reach, the use of specific
brands, specification

Page 115 of 179

BMW CONVERTIBLE 1998 Owners Manual 11 4
We recommend winter tires (M+S radial
tires) for operation under inclement win-
ter driving conditions. Although all-sea-
son M+S tires provide better winter
traction than standard summer tires

Page 116 of 179

BMW CONVERTIBLE 1998 Owners Manual 11 5
At a glanceControlsCar careRepairsTechnicalDataIndex
b
Size 185/65 R 15 88 T tires are
only for the BMW 318i Sedan.c
b
Sizes 225/55 R 15 92 V,
225/55 R 92 Q, T, H M+S, 225/50 ZR 16.
These tires

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