
05 Locks and alarm
Child safety locks
05
132* Option/accessory, for more information, see Introduction.
G021513
Child safety locks in the rear doors - driver's side
and passenger's side respectively
Manual child safety locks – rear doorsThe controls are located on the rear door
jambs. Use a key or small screwdriver to adjust
these controls.
Turn outward: the door cannot be
opened from the inside. The door can be
opened from the outside.
Turn inward: the door locks function
normally (the door can be opened from the
inside).
WARNING
Remember, in the event of an accident, the
rear seat passengers cannot open the doors
from the inside with the buttons in position
A.
REAR
AC
G027105
Power child locks*To prevent the rear doors from being opened
from the inside:
1. Turn the vehicle's ignition key to at least
position I or II.
2. Press the button in the center console (see
the illustration).Indicator light in the button ON: the rear
doors and windows cannot be opened from the
inside.
Indicator light in the button OFF: the rear
doors can be opened from the inside and the
windows can be opened.
A message will appear in the instrument panel
display when the child safety locks are acti-
vated/deactivated.

06 Starting and driving
Refueling
06
141 Fuel filler door
G027073
The fuel filler cap can be placed on the hook on
the fuel filler door while refueling
Press the button on the light switch panel (see
the illustration on page 67) when the vehicle is
at a standstill to unlock the fuel filler door.
Please note that the fuel filler door will remain
unlocked until the vehicle begins to move for-
ward. An audible click will be heard when the
fuel filler door relocks.
If you intend to leave your vehicle while it is
being refueled, this feature enables you to lock
the doors/tailgate while leaving the fuel filler
door unlocked.You can also keep the vehicle locked if you
remain inside it during refueling. The central
locking button does not lock the fuel filler door.
Be sure the fuel filler door is not obstructed and
is completely closed after refueling.
Open the fuel filler cap slowly during hot
weather.
NOTE
During a transitional period, a small number
of service stations may still have fuel noz-
zles that are not compatible with the fuel
filler neck on vehicles equipped with the
evaporative control system.
RefuelingThe fuel tank is designed to accommodate
possible expansion of the fuel in hot weather.
See page 290 for fuel tank volume. Be aware
that the "usable" tank capacity will be some-
what less than the specified maximum. When
the fuel level is low, such factors as ambient
temperature, the fuel's "Reid vapor pressure"
characteristics, and terrain can affect the fuel
pump's ability to supply the engine with an
adequate supply of fuel. Therefore, it is advis-
able to refuel as soon as possible when theneedle nears the red zone, or when the fuel
warning light comes on.
WARNING
Never carry a cell phone that is switched on
while refueling your vehicle. If the phone
rings, this may cause a spark that could
ignite gasoline fumes, resulting in fire and
injury.

06 Starting and driving
Starting the vehicle
06
143 Starting the engine
WARNING
Before starting, check that the seat, steering
wheel and mirrors are adjusted properly.
Make sure the brake pedal can be
depressed completely. Adjust the seat if
necessary, see page 104.
1. Fasten the seat belt.
2. Apply the parking brake (hand brake) if not
already set. The gear selector is locked in
the P position (SHIFTLOCK).
3. Without touching the accelerator pedal,
turn the ignition key
1 to the starting posi-
tion. Allow the starter to operate for up to
10 seconds. Release the key as soon as
the engine starts
2. If the engine fails to
start, repeat this step.
CAUTION
If the engine does not start after the third try,
wait for approximately 3 minutes before try-
ing to start it again to give the battery time
to recover its starting capacity.
WARNING
•Never use more than one floor mat at a
time on the driver's floor. An extra mat
on the driver's floor can cause the
accelerator and/or brake pedal to
catch. Check that the movement of
these pedals is not impeded.
•Volvo's floor mats are specially manu-
factured for your car. They must be
firmly secured in the clips on the floor so
that they cannot slide and become trap-
ped under the pedals on the driver's
side.
NOTE
•If the key blade section of the remote is
not fully folded out when starting the
vehicle, the immobilizer function may
make it impossible to start the engine.
•After a cold start, idle speed may be
noticeably higher than normal for a
short period. This is done to help bring
components in the emission control
system to their normal operating tem-
perature as quickly as possible, which
enables them to control emissions and
help reduce the vehicle's impact on the
environment.
•To release the gear selector from the P
(Park) position, the engine must be run-
ning (or the ignition key must be in posi-
tion II) and the brake pedal must be
depressed.
•Select the desired gear. The gear
engages after a very slight delay which
is especially noticeable when selecting
R.
1If two of the keys to your vehicle are close together, e.g. on the same key ring when you try to start the vehicle, this could cause interference in the immobilizer system and result in the vehicle not
starting. If this should occur, remove one of the keys from the key ring before trying to start the vehicle again.
2On vehicles equipped with the autostart feature, release the key immediately. See also page 145.

06 Starting and driving
Starting the vehicle
06
144
NOTE
Your vehicle is equipped with a KEYLOCK
system. When the engine is switched off,
the gear selector must be in the P position
before the key can be removed from the
ignition switch.
When starting in cold weather, the trans-
mission may shift up at slightly higher
engine speeds than normal until the auto-
matic transmission fluid reaches normal
operating temperature.
NOTE
Do not race a cold engine immediately after
starting. Oil flow may not reach some lubri-
cation points fast enough to prevent engine
damage.
WARNING
Always place the gear selector in Park and
apply the parking brake before leaving the
vehicle. Never leave the vehicle unattended
with the engine running.
•Always open garage doors fully before
starting the engine inside a garage to
ensure adequate ventilation. The
exhaust gases contain carbon monox-
ide, which is invisible and odorless but
very poisonous.
CAUTION
Automatic transmission
•The engine should be idling when you
move the gear selector. Never acceler-
ate until after you feel the transmission
engage! Accelerating immediately after
selecting a gear will cause harsh
engagement and premature transmis-
sion wear.
•Selecting P or N when idling at a stand-
still for prolonged periods of time will
help prevent overheating of the auto-
matic transmission fluid.

06 Starting and driving
Ignition switch and steering wheel lock
06
145 Ignition switch and steering wheel lock
0 – Locked position:
Remove the key to lock
the steering wheel
A.
I – Intermediate posi-
tionB – "radio position":
Certain accessories,
radio, etc. on, daytime
running lights off.
II – Drive position: The
key position when driv-
ing. The vehicle's entire
electrical system is con-
nected.
III – Start position:
Release the key when the
engine starts. The key
returns automatically to
the Drive position.
A chime will sound if the key is left in the
ignition and the driver's door is opened.
AThe gear selector must be in the P (Park) position (automatic
transmission).
BPlease be aware that leaving the key in this position will
increase battery drain.
AutostartThis function makes it possible to start the
vehicle without holding the key in the start
position (position III) until the engine starts.
Turn the key to position III and release it. The
starter motor will then operate automatically
(for up to ten seconds) until the engine starts.
Steering wheel lockThe steering wheel lock might be under tension
when the vehicle is parked.
Turn the steering wheel slightly to free the igni-
tion key.
In order to help reduce vehicle theft, make sure
the steering wheel lock is engaged before leav-
ing the vehicle.
WARNING
Never switch off the ignition (turn the ignition
key to position 0) or remove the key from the
ignition switch while the vehicle is in motion.
This could cause the steering wheel to lock,
which would make the vehicle impossible to
steer.

06 Starting and driving
Difficult driving conditions
06
147 Driving on rough/unpaved surfaces
The Volvo XC90 is designed primarily for on-
road driving, and it has excellent handling cha-
racteristics on very rough or unpaved roads.
When driving on poorly maintained or unpaved
roads, please keep the following in mind:
•Reduce speed on rough surfaces to mini-
mize possible damage to the vehicle's
underbody.
•When driving on soft surfaces such as dry
sand or snow, try to avoid stopping if at all
possible.
WARNING
•Avoid driving diagonally across steep
inclines as this could increase the risk of
a roll-over. Try to drive straight up or
down the slope.
•If the road is very steep, avoid turning
the vehicle around to help avoid the risk
of rolling over. Back the vehicle up or
down the incline instead.
NOTE
Avoid driving on steep inclines if the fuel
tank is nearly empty. If the flow of fuel to the
engine is interrupted due to the vehicle's
angle of inclination, this could result in dam-
age to the three-way catalytic converter. We
recommend keeping the fuel tank at least
half full when driving on steep inclines.
Driving through water
The vehicle can be driven through water up to
a depth of approximately 16 inches (40 cm), at
a maximum speed of 6 mph (10 km/h).
Take particular care when driving through flow-
ing water.
Clean the electrical connections for trailer wir-
ing after driving in mud or water.
When driving through water, maintain low
speed and do not stop in the water.
WARNING
After driving through water, press lightly on
the brake pedal to ensure that the brakes
are functioning normally. Water or mud can
make the brake linings slippery, resulting in
delayed braking effect.
CAUTION
•Engine damage will occur if water is
drawn into the air cleaner.
•If the vehicle is driven through water
deeper than 18 in (48 cm), water may
enter the differential and the transmis-
sion. This reduces the oil's lubricating
capacity and may shorten the service
life of these components.
•Do not allow the vehicle to stand in
water up to the door sills longer than
absolutely necessary. This could result
in electrical malfunctions.
•If the engine has been stopped while the
car is in water, do not attempt to restart
the engine. Have the car towed out of
the water.

06 Starting and driving
Brake system
06
* Option/accessory, for more information, see Introduction.153 BRAKE Brake circuit malfunction
The brake system is a hydraulic system con-
sisting of two master cylinders and two sepa-
rate brake circuits. If a problem should occur in
one of these circuits, it is still possible to stop
the vehicle with the other brake circuit.
If the brake pedal must be depressed farther
than normal and requires greater foot pressure,
the stopping distance will be longer.
A warning light in the instrument panel will light
up to warn the driver that a fault has occurred.
If this light comes on while driving or braking,
stop immediately and check the brake fluid
level in the reservoir.
NOTE
Press the brake pedal hard and maintain
pressure on the pedal – do not pump the
brakes.
WARNING
If the fluid level is below the MIN mark in the
reservoir or if a BRAKE FAILURE STOP
SAFELY message is displayed in the text
window: DO NOT DRIVE. Have the vehicle
towed to a trained and qualified Volvo serv-
ice technician and have the brake system
inspected.
NOTE
When the vehicle is at a standstill and the
engine is idling, e.g. at a traffic light and the
brake pedal is depressed, the pedal may go
down slightly. This is a normal function of
the power-assisted brake system.
Brake pad inspectionOn vehicles equipped with a jack*, the condi-
tion of the brake pads can be checked by rais-
ing the vehicle (see page 195 for information
about using the jack and removing a wheel)
and performing a visual inspection of the brake
pads.
WARNING
•If the vehicle has been driven immedi-
ately prior to a brake pad inspection, the
wheel hub, brake components, etc., will
be very hot. Allow time for these com-
ponents to cool before carrying out the
inspection.
•Apply the parking brake and put the
gear selector in the Park (P) position.
•Block the wheels standing on the
ground, use rigid wooden blocks or
large stones.
WARNING
•Use the jack intended for the vehicle
when changing a tire. For any other job,
use stands to support the vehicle.
•The jack should be kept well-greased
and clean, and should not be damaged.
•Be sure the jack is on a firm, level, non-
slippery surface.
•No objects should be placed between
the base of jack and the ground, or
between the jack and the attachment
bar on the vehicle.
•The jack must correctly engage the jack
attachment.
•Never allow any part of your body to be
extended under a vehicle supported by
a jack.
Power brakes function only when the
engine is running
The power brakes utilize vacuum pressure
which is only created when the engine is run-
ning. Never let the vehicle roll to a stop with the
engine switched off.
If the power brakes are not working, consider-
ably higher pressure will be required on the
brake pedal to compensate for the lack of
power assistance. This can happen for exam-
ple when towing your vehicle or if the engine is

06 Starting and driving
Brake system
06
154
switched off when the vehicle is rolling. The
brake pedal feels harder than usual.
Water on brake discs and brake pads
affects braking
Driving in rain and slush or passing through an
automatic car wash can cause water to collect
on the brake discs and pads. This will cause a
delay in braking effect when the pedal is
depressed. To avoid such a delay when the
brakes are needed, depress the pedal occa-
sionally when driving through rain, slush etc.
This will remove the water from the brakes.
Check that brake application feels normal. This
should also be done after washing or starting
in very damp or cold weather.
Severe strain on the brake systemThe brakes will be subject to severe strain
when driving in mountains or hilly areas, or
when towing a trailer. Vehicle speed is usually
slower, which means that the cooling of the
brakes is less efficient than when driving on
level roads. To reduce the strain on the brakes,
shift into a lower gear and let the engine help
with the braking. Do not forget that, if you are
towing a trailer, the brakes will be subjected to
a greater than normal load.
Anti-lock brakes (ABS)If the ABS warning lamp lights up there is a
malfunction in the ABS system (the standardbraking system will however function) and the
vehicle should be driven cautiously to a trained
and qualified Volvo service technician for
inspection. The Anti-lock Braking System
(ABS) helps to improve vehicle control (stop-
ping and steering) during severe braking con-
ditions by limiting brake lockup. When the sys-
tem "senses" impending lockup, braking pres-
sure is automatically modulated in order to help
prevent lockup, which could lead to a skid.
The system performs a self-diagnostic test
when the engine is started and when the
vehicle first reaches a speed of approxi-
mately 12 mph (20 km/h). The brake pedal will
pulsate several times and a sound may be
audible from the ABS control module. This is
normal.
To obtain optimal effect from the ABS system,
constant pressure should be kept on the brake
pedal. Do not pump the brake pedal.
The switching of the ABS modulator will be
audible and the brake pedal will pulsate during
braking. Please be aware that ABS does not
increase the absolute braking potential of the
vehicle. While control will be enhanced, ABS
will not shorten stopping distances on slippery
surfaces.
ABS with EBD (Electronic Brake Force
Distribution)
EBD is an integrated part of the ABS system.
EBD regulates the hydraulic pressure to the
rear brakes to help provide optimal braking
capacity. The brake pedal will pulsate during
braking, which is normal.
If the BRAKE and ABS warning lights come on
at the same time, this could indicate a fault in
the brake system.
1. Stop the vehicle in a suitable place and
switch off the engine.
2. Restart the engine.
•If both warning lights go off, no further
action is required.
•If both lights are still on after the engine has
been restarted, switch off the engine again
and check the brake fluid level (see
page 223 for the location of the brake fluid
reservoir).
WARNING
If the fluid level is below the MIN mark in the
reservoir or if a Brake failure – Service
urgent message is displayed in the text
window: DO NOT DRIVE. Have the vehicle
towed to a trained and qualified Volvo serv-
ice technician and have the brake system
inspected.