2013 BMW M3 CONVERTIBLE brakes

97
Technology for driving comfort and safety
Controls
Malfunction
The warning lamp lights up. A mes-
sage appears on th
e Control Display.
PDC is malfunctioning. Have the
system checked.
To avoid this problem, keep the sensors clean
and free of ice or snow in order to ensure that
they will continue to op erate effectively. When
using a high-pressure cleaner, do not spray the
sensors for extended periods of time and only
from a distance of at least 1 ft/30 cm.
Manual operation
The LED above the button also flashes.
PDC with visual warning
The approach of the vehicle to an object is
shown on the Control Display. Objects that are
farther away are displayed on the Control Dis-
play before a signal to ne sounds. The display
appears on the Control Display as soon as PDC
is activated.
System limitations
Even with PDC, final responsibility for
estimating the distance between the
vehicle and any obstructions always remains
with the driver. Even when sensors are pro-
vided, there is a blind spot in which objects can
no longer be detected. The system is also sub-
ject to the physical limit s that apply to all forms
of ultrasonic measurement, such as those
encountered with traile r towbars and hitches,
thin or wedge-shaped objects, etc. Low objects
that have already been displayed, e.g. curbs,
can disappear again from the detection area of
the sensors before or after a continuous tone
sounds. Higher, protruding objects, e.g. ledges,
cannot be detected. Therefore, always drive
cautiously; otherwise, there is a risk of personal
injury or property damage.
Loud sound sources outside or inside the car
can drown out the PDC signal. Therefore,
always drive cautiously; otherwise, there is a
risk of personal injury or property damage. <
Driving stability control
systems
Your BMW has a number of systems that help
to maintain the vehicle's stability even in
adverse driving conditions.
ABS Antilock Brake System
ABS prevents locking of the wheels during
braking. Safe steering response is maintained
even during full braking. Active safety is thus
increased.
The ABS is operational every time you start the
engine. Braking safely, refer to page138.
Electronic brake-force distribution
EBV
The system controls the brake pressure in the
rear wheels to ensure stable braking behavior.
Dynamic Brake Control DBC
When you apply the brakes rapidly, this system
automatically produces the maximum braking
force boost and thus helps to achieve the short-
est possible braking distance during full brak-
ing. This system exploi ts all of the benefits
provided by ABS.
Do not reduce the pressu re on the brake for the
duration of the full braking application.
Dynamic Stability Control DSC
DSC prevents the driving wheels from losing
traction when you pull aw ay from rest or accel-
erate. The system also recognizes unstable
driving conditions, for example if the rear of the
car is about to swerve or if momentum is acting
at an angle past the front wheels. In these
cases, DSC helps the vehicle maintain a safe
course within physical limits by reducing engine
output and through brakin g actions at the indi-
vidual wheels.

00320051004F004C00510048000300280047004C0057004C005200510003

99
Technology for driving comfort and safety
Controls
xDrive
xDrive is your BMW's fo
ur-wheel-drive system.
The combined efforts of xDrive and DSC help to
further optimize traction and driving dynamics.
The xDrive four-wheel-drive system distributes
driving power variably to the front and rear axles
depending on the driving situation and road
conditions.
Hill Descent Control HDC
HDC is a downhill driving assistant that controls
your speed on steep downhill gradients and
makes it even easier to control your BMW's
handling under these conditions. The vehicle
then moves slightly fast er than double walking
speed without the driver needing to intervene.
HDC is available for activation at vehicle speeds
below approx. 20 mph or 35 km/h. When driving
downhill at a speed of under approx. 20 mph or
35 km/h, the vehicle's speed is automatically
reduced to slightly more than double walking
speed and maintained.
Increasing or de creasing speed
You can use the accelerato r or brakes to vary
this automatically cont rolled speed within a
range of between approx. 3 mph/5 km/h and
20 mph/25 km/h.
You can specify a target speed within the same
range by using the lever of the cruise control.
1 To increase speed
2 To decrease speed
Activating HDC
Press the button; the LED lights up.
When the vehicle is being braked automatically,
the LED flashes.
Deactivating HDC
Press the button again; the LED goes out.
HDC is automatically de activated at speeds
over approx. 40 mph or 60 km/h.
Using HDC
In cars with manual transmission:
Use HDC in lower gears and in reverse gear.
With automatic transmission:
You can use HDC in any drive position.
Displays in the instrument cluster
1 Display for target speed
2 HDC display
Malfunction
The HDC display disappears during HDC
operation, or does not appear:
HDC is temporarily unav ailable due to exces-
sive brake temperature, or DSC has failed.

00320051004F004C00510048000300280047004C0057004C005200510003

136
Driving tipsThings to remember when driving
Things to remember when driving
Vehicle equipment
In this chapter, all pr oduction, country, and
optional equipment that is offered in the model
range is described. For this reason, descrip-
tions will be given of some equipment that may
not be available in a vehi cle, for example due to
the special options or national-market version
selected. This also app lies to safety related
functions and systems.
Break-in period
Moving parts need breaking-in time to adjust to
each other. Please follo w the instructions below
in order to achieve the optimal service life and
economy of operation for your vehicle.
Engine and differential
Always obey all official speed limits.
Up to 1,200 miles/2,000 km
Drive at varying engine and road speeds, but do
not exceed an engine speed of 4,500 rpm or a
road speed of 100 mph/160 km/h.
Avoid full-throttle operation and use of the
transmission's kickdown mode.
After driving 1,200 miles/2,000 km
Engine and vehicle speeds can be gradually
increased.
Tires
Due to technical factors associated with their
manufacture, tires do not achieve their full
traction potential until af ter an initial break-in
period. Therefore, drive cautiously during the
first 200 miles/300 km.
Brake system
Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve optimized
contact and wear patterns between brake pads
and rotors. Drive cautiously during this break-in
period.
Clutch
The function of the clut ch reaches its optimal
level only after a distance driven of approx.
300 miles/500 km. During this break-in period,
engage the clutch gently.
Following part replacement
The same break-in procedures should be
observed if any of the components mentioned
above have to be renewe d in the course of the
vehicle's operating life.
Saving fuel
The fuel consumption of your vehicle depends
on several factors. You can lower fuel consump-
tion and the environmental impact by taking
certain measures, adjusting your driving style
and having the vehicl e serviced regularly.
Remove any unneeded cargo
Additional weight increases fuel consumption.
Remove any mounted parts after you
have finished using them
Remove unneeded additional mirrors, the roof
rack and the rear luggage rack after use.
Mounted parts affect th e vehicle's aerodynam-
ics and increase fuel consumption.
Close the windows and glass roof
An open glass roof or window causes higher
air resistance and thus increases fuel
consumption.

00320051004F004C00510048000300280047004C0057004C005200510003

138
Driving tipsThings to remember when driving
Hot exhaust system
In all vehicles, extremely high tempera-
tures are generated in the exhaust sys-
tem. Do not remove the heat shields installed
adjacent to various sect ions of the exhaust sys-
tem, and never apply un dercoating to them.
When driving, standing at idle and while park-
ing, take care to avoid possible contact
between the hot exhaust system and any highly
flammable materials such as hay, leaves, grass,
etc. Such contact could le ad to a fire, with the
risk of serious personal injuries and property
damage. Do not touch hot exhaust tail pipes.
Otherwise, there is a risk of burns. <
Mobile phones in the vehicle
It is not advisable to use wireless devices
such as mobile phones inside the vehicle
without a direct connection to an external aerial.
Otherwise, it is not poss ible to exclude the pos-
sibility of a reciprocal interference occurring
between the vehicle electronics and the wire-
less device. Otherwise, there is no assurance
that the radiation genera ted by the radio trans-
mission will be conveyed out of the passenger
compartment.<
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 brak e be properly applied.<
The risk of hydropla ning increases with
declining tread depth on th e tires, refer also to
Minimum tread depth on page 251.
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
assistant, refer to page 100.
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. Sinc e 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.
Objects in the movement range of the
pedals
Keep floor mats, carpet, and other objects
out of the movement range of the pedals;
otherwise, they may inhi bit the function of the
pedals during driving.
Do not place additional floor mats onto an
existing one or onto other objects.
Only use floor mats that have been approved for
the vehicle and can be appropriately fastened.
Make sure that the floo r mats are securely fas-
tened again after they ha ve been removed, e.g.
for cleaning. <
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pre ssure 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 th en be available when
you need it.

00320051004F004C00510048000300280047004C0057004C005200510003

139
Things to remember when driving
Driving tips
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 br aking is required. Even
light but consistent brak e 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 he lps you avoid placing
excessive loads on the brake system. Down-
shifting in manual mo de of the automatic
transmission, refer to page 66.
Sport automatic transm ission with double
clutch: never drive with the transmission
in neutral or with the en gine switched off; other-
wise, there will be no en gine braking action and
no power assistance to the brakes and steering.
Manual transmission: never drive with the
clutch held down, with the transmission in neu-
tral or with the engine switched off; otherwise,
there will be no engine braking action and no
power assistance to the brakes and steering. <
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 le ss frequent, there is an
increased tendency for corrosion to form on
rotors, while contaminan ts 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.
When the vehicle is parked
Condensation forms while the automatic
climate control is in operation, and then exits
under the vehicle. Traces of condensed water
under the vehicle are therefore normal.
Cargo loading
To avoid loading the tires beyond their
approved carrying ca pacity, never over-
load the vehicle. Overlo ading can lead to over-
heating and increases the rate at which damage
develops inside the tires. In some situations,
this can result in sudden loss of tire pressure. <
Make sure that no liquids are spilled or
leak from their containers in the trunk, as
this could result in damage to the vehicle.<
Determining loading limit
1. Locate the following statement on your
vehicle's placard:
The combined weight of occupants
and cargo should never exceed
XXX kg or YYY lbs. Otherwise damage to
the vehicle may occur and unstable driving
conditions may result.<
2. Determine the combined weight of the
driver and passengers that will be riding in
your vehicle.
3. Subtract the combined weight of the driver
and passengers from XXX kilograms or YYY
pounds.
4. The resulting figure equals the available
amount of cargo and luggage load capacity.
For example, if the YYY amount equals

00320051004F004C00510048000300280047004C0057004C005200510003

263
Care
Mobility
Driving into an automatic car wash
Perform the following steps to ensure that the
vehicle can roll:
Manual transmission:
1.
Shift into neutral.
2. Release parking brake, refer to page 64.
3. Switch off the engine.
4. Leave the remote cont rol in the ignition
lock.
Automatic transmission:
1. Insert the remote control into the ignition
lock, even with Comfort Access.
2. Shift selector lever into position N.
3. Release parking brake, refer to page 64.
4. Switch off the engine.
5. Leave the remote cont rol in the ignition
lock.
Sport automatic transmission with double
clutch:
Before driving into an automatic car wash,
perform the following steps to ensure that the
vehicle can roll:
1. Insert the remote control into the ignition
lock, even with Comfort Access.
2. Engage transmission position N.
3. Release parking brake, refer to page 64.
4. Switch off the engine.
5. Leave the remote control in the ignition lock
so that the vehicle can roll.
The transmission is switched into position P:
> Automatically after approx. 30 minutes
> If you remove the infrared remote control
from the ignition lock
Headlamps
After washing the vehicle
After washing the ve hicle, apply the
brakes briefly to dry them; otherwise,
water can reduce braking efficiency over the
short term and the brake discs can corrode. order to prevent impaired vision due to smear
formation and to reduce wiper noise and wiper
blade wear.
Vehicle care
Care products
BMW recommends using BMW cleaning and
care products since they have been tested and
approved for this purpose.
Follow the instructions on the packaging.
When cleaning inside the vehicle, always
open the doors and windows. Only use prod-
ucts designed for cleaning vehicles. Cleaning
agents can contain substances that are danger-
ous or hazardous to your health. <
Vehicle paintwork
Regular care contributes to driving safety and
value retention. Enviro nmental influences in
regions with elevated leve ls of air pollution or
natural contaminants such as tree sap or pollen
can impact vehicle paintwork. The frequency
and scope of car care should be adapted
accordingly.
Immediately remove particularly corrosive sub-
stances such as spilled fuel , oil, grease, or bird
droppings to prevent damage to the paintwork.
Leather care
Frequently remove dust from the leather using
a cloth or vacuum cleaner.
Otherwise, dust and road grit in the pores and
folds of the leather will otherwise have an abra-
sive effect, resulting in increased wear and
causing the leather surface to become brittle
prematurely.
In order to prevent staining, e.g due to clothing,
clean the leather approximately every two
months.
Clean light-colored leather more frequently as it
shows dust and dirt more noticeably.

00320051004F004C00510048000300280047004C0057004C005200510003

291
Everything from A to Z
Reference
Automatic recirculated air
control AUC 117
Automatic Service Request 227
Automatic transmission with
Steptronic 65
– interlock 65
– overriding selector lever
lock 67
– shiftlock, refer to Changing selector lever position 65
– sport program 66
– towing 275
– tow-starting 275
AUTO program for automatic climate control 116
AUX-In connection 125,189
Available services 228
Average fuel consumption 85
– setting the units 88
Average speed 85
Avoid highways in
navigation 155
Avoiding unintentional alarms 39
Axle loads, refer to Weights 281
B
Backing up the music
collection 188
Backrest contour, refer to Lumbar support 50
Backrests, refer to Seat adjustment 49
Backrest width adjustment 50
Back seats
– refer to Rear seats 52
Bag holder 129
Band-aids, refer to First aid pouch 273
Bar, refer to Towing
methods 276 Base plate for telephone or
mobile phone
– refer to Snap-in adapter 211
– refer to Snap-in adapter in the center armrest storage
compartment 124
Bass, tone control 167
Battery 270
– charging 270
– disposal 41,271
– jump starting 274
– remote control 32
– replacing 270
– temporary power failure 270
Battery renewal
– remote control 41
– remote control for vehicle 41
Being towed 275
Belt hand-over 54
– pinch protection system 55
Belts, refer to Safety belts 54
Belt tensioner, refer to Safety
belts 54
Beverage holders, refer to Cupholders 125
Black ice, refer to Outside temperature warning 83
Blinds, refer to Roller
sunblinds 124
Blower, refer to Air volume 117
Bluetooth, activating/ deactivating 201
Bluetooth audio 192
– disconnecting an audio connection 195
– pairing device 193
– playback 194
– unpairing device 195
– what to do if … 195
BMW Assist 224
– updating 228
BMW Homepage 4
BMW Info 218
BMW Maintenance
System 260
BM

W Online 226 BMW webpage
4
Bottle holders, refer to
Cupholders 125
Brake Assist, refer to Dynamic Brake Control DBC 97
Brake fluid, refer to Service requirements 88
Brake Force Display 106
Brake lights
– brake force display 106
Brake pads 136
– breaking in 136
Brake pedal, refer to Braking safely 138
Brake rotors 139
– brakes 136
– breaking in 136
Brakes
– ABS 97
– BMW Maintenance System 260
– brake force display 106
– breaking in 136
– parking brake 64
– service requirements 88
Brakes, refer to Braking safely 138
Brake system 136
– BMW Maintenance System 260
– breaking in 136
– disc brakes 139
Breakdown services, refer to Roadside Assistance 273
Breaking in the clutch 136
Breaking in the differential, refer to Engine and
differential 136
Break-in period 136
Brightness of the Control
Display 95
Bulb changing, refer to Lamps and bulbs 266
Button for starting the engine, refer to Start/Stop button 62
Buttons on the steering
wheel 13

00320051004F004C00510048000300280047004C0057004C005200510003