1998 BMW CONVERTIBLE traction control

Contents

At a glance
Controls and features

Cockpit16
Instrument cluster18
Indicator and warning
lamps20
Hazard warning system22
Hazard warning triangle22
First-aid kit22
Refueling23
Fuel specification23
CARB OBD II interface24
Tire inflation pressures25

Locks and security systems:

Keys30
Electronic immobilizing device35
Doors31
Trunk lid33
Luggage compartment34
Power windows35
Sliding/tilt sunroof36
Convertible top operation37

Adjustments:

Seats43
Steering wheel45
Mirrors46

Passenger safety systems:

Safety belts47
Child restraint system48
Installing child seats49
Airbags50
Child-safety locks52
Rollover protection system Ð
convertible52
Driving:

Steering/ignition lock54
Starting the engine54
Switching off the engine55
Parking brake56
Manual transmission57
Automatic transmission58
Turn signals/high beam60
Wiper/washer system61
Cruise control62

Everything under control:

Odometer63
Tachometer63
Energy control63
Fuel gauge64
Coolant temperature gauge64
Service Interval Display64
Multi-Information Display (MID)66
Outside temperature display
and digital clock68
Check Control71
Check Control with outside
temperature display and
digital clock74
Onboard computer77

Technology for driving comfort
and safety:

Automatic stability control
plus traction (ASC+T)84

Contents

Owner service procedure
Advanced technology
Technical data

Replacement procedures:

Onboard tool kit140
Windshield wiper blades140
Lamps and bulbs141
Master key with
battery lamp145
Changing tires146
Battery149
Fuses151

In case of electrical
malfunction:

Fuel filler door 152
Sliding/tilt sunroof 152

Assistance, giving and receiving:

Jump-starting153
Towing the vehicle154
Towing154Airbags156
Automatic Stability Control
plus Traction (ASC+T)156
Radio reception157
Safety belt tensioner157Engine specifications 160
Dimensions 161
Weights 163
Capacities 166
Electrical system 167
Drive belts 167

20

Turn signal left/right, green

k

Flashes when the turn signals
are in operation.

Battery charge current, red

v

Goes out after the engine has
started.
If the lamp comes on during
normal vehicle operation:
The battery is no longer being charged.
Indicates a defect in the generator drive
belt or the charging circuit.

a

If the V-belt is defective, do not run
the coolant pump; overheating and
potential engine damage would result.
Contact your BMW Retailer.

c

High beam, blue

l
Lights up when the high beams
are switched on or the head-
lamp flashers are activated.
Engine oil pressure, redw
Goes out after the engine has
started. May come on briefly at
idle when the engine is hot,
but must go out again at higher engine
speed.
If the lamp comes on during normal vehi-
cle operation: stop vehicle and switch off
engine immediately. Check engine oil
level; if necessary, add oil. If oil level is
correct: contact your BMW Retailer.
Foglamps
*, green
t
Lights up whenever you switch
on the foglamps.
Airbags, redp
This lamp turns on for an oper-
ational check when you turn the
ignition key to position 1. If, at
the operation check, it does not go on,
or goes on while driving, have it checked
at your BMW Retailer.
Additional notes: Page 50
Automatic transmission
*, yellow
O
Goes out after the engine has
started.
Additional notes: Page 58
ASC+T (Automatic Stability
Control plus Traction), yellows
Goes out shortly after the igni-
tion is switched on:
System OK.
Additional notes: Page 84
ABS (Antilock Brake System),
yellowo
Goes out after the engine has
started. If the lamp comes on
during normal vehicle opera-
tion: ABS has been deactivated in
response to a system malfunction. Con-
ventional braking force remains unim-
paired.
Additional notes: Page 103
Brake pad wear, yellow#
Lights up when starter is actu-
ated and goes out when the
engine is started.
If the lamp comes on during normal
vehicle operation: replace brake pads
immediately.
a
Use only original BMW-approved
brake pads otherwise the vehicle
authorization is no longer valid.c
Indicator and warning lamps

At a glance
Controls and featuresCare and maintenanceAdvanced technology
Technical data
Owner service procedure
At a glanceControls Car careRepairsTechnicalDataIndex
Index
29
Technology for driving comfort
and safety:
Automatic Stability Control
plus Traction (ASC+T)84
Lamps:
Headlamp switch85
Instrument panel lighting85
Foglamps86
Interior lamps86
Reading lamps86
An inviting climate:
Heated seats87
Independent ventilation
system87
Automatic climate control88Cabin convenience:
BMW Hi-Fi System93
Glove compartment93
Ashtray94
Coin box, cup holder94
Cigarette lighter94
Center arm rest, rear95
Through-loading system95
Ski bag95
Cargo loading98

84
Automatic Stability Control plus
Traction (ASC+T)This system is designed to enhance
operating stability, especially while
accelerating and during cornering.
ASC+T automatically assumes opera-
tion each time you start the engine.
The indicator lamp in the instrument
cluster goes out shortly after you switch
on the ignition.
To deactivate the systemPress the button; the indicator lamp
comes on.To reactivate the systemPress the button again; the indicator
lamp goes out.Indicator lamp flashesThe system is actively regulating drive
torque in response to monitored vehicle
operating conditions.Indicator lamp fails to go out after
the engine is started, or comes on
in the course of normal vehicle
operationThe system has a defect. The vehicle
normally remains operational even with-
out ASC+T. Consult your authorized
BMW Retailer for repair.When ASC+T is switched off, you drive
with a conventional drive system. We
recommend that you deactivate the
system for increased traction
dwhen rocking the vehicle or starting
off in deep snow or on loose surfaces
(refer to "Starting off", page 10 5)
dor when driving with snow chains.
b
But even with ASC+T the laws of
physics can not be suspended. Any
consequences arising from traction loss
due to excessive vehicle speed remain
the responsibility of the driver. We
therefore urge you to avoid using the
additional safety margin of the system
as an excuse for taking risks.c
For more details, please refer to section
"Advanced Technology" on page 156.
ASC
360de064ASC+T

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)

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

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 be continu-
ally borne in mind.
ABS is intended to prevent the wheels
from locking under braking; to help the
vehicle to remain stable and sensitive to
steering. Should the ABS fail, with lock-
ing wheels as a result: Reduce the
pressure on the brake pedal until the
wheels just start to roll again while still
maintaining enough force to continue
braking. Then increase the pressure,
release the pressure when the wheels
lock, reapply pressure, etc.
This staggered braking procedure will
reduce stopping distances while help-
ing you maintain steering control.
It can allow you to steer around hazards
once you have reduced the pressure on
the brake pedal.
a
Never downshift to exploit engine
braking when driving on slippery road
surfaces; it could lead to loss of rear-
wheel traction and endanger vehicle
control. ABS and ASC+T can not protect
against such loss of traction, since they
have no effect on this kind of decelera-
tion.c
b
Disengage the clutch during hard
braking on road surfaces affording only
poor or uneven traction.c
Loss of lateral traction (sliding)Release the accelerator pedal and
depress the clutch pedal or push the
selector lever to position N with auto-
matic transmission. Countersteer care-
fully and attempt to regain control of the
vehicle.
ParkingSelect 1st or reverse gear. If your car is
equipped with an automatic transmis-
sion, select Park. Engage the parking
brake when parking on hills and
inclined surfaces. To prevent frost and
corrosion from locking the parking
brake liners at the drum, you can dry
them by gently pulling up the lever
while stopping (ensure that you do not
endanger following traffic).a
The brake lamps do not light up
when the parking brake is applied.c
Winter driving