trailer Seat Altea XL 2015 Owner's Manual

Table of Contents
Table of Contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safe driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Safety first! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Advice about driving . . . . . . . . . . . . . . . . . . . . . 5
Proper sitting position for occupants . . . . . . . . 6
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
The reason why we should wear seat belts . . . 11
How to properly adjust your seatbelt . . . . . . . . 14
Seat belt tensioners . . . . . . . . . . . . . . . . . . . . . . 16
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Brief introduction . . . . . . . . . . . . . . . . . . . . . . . . 17
Airbag overview . . . . . . . . . . . . . . . . . . . . . . . . . 20
Deactivating airbags . . . . . . . . . . . . . . . . . . . . . 23
Transporting children safety . . . . . . . . . . . . . . . 24
Safety for children . . . . . . . . . . . . . . . . . . . . . . . 24
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Warning lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Digital instrument panel display . . . . . . . . . . . . 47
Instrument panel menus* . . . . . . . . . . . . . . . . . 50
Steering wheel controls* . . . . . . . . . . . . . . . . . . 57
General information . . . . . . . . . . . . . . . . . . . . . . 57
Audio system . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Radio navigation system . . . . . . . . . . . . . . . . . . 61
Opening and closing . . . . . . . . . . . . . . . . . . . . . 63
Central locking . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Radio frequency remote control . . . . . . . . . . . . 67
Anti-theft alarm system* . . . . . . . . . . . . . . . . . . 68
Boot hatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Electric windows . . . . . . . . . . . . . . . . . . . . . . . . . 72
Sliding/tilting sunroof* . . . . . . . . . . . . . . . . . . . 74
Lights and visibility
. . . . . . . . . . . . . . . . . . . . . . 75
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Interior lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Visibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Windscreen wiper and rear window wiper
systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Rear vision mirrors . . . . . . . . . . . . . . . . . . . . . . . 86
Seats and head restraints . . . . . . . . . . . . . . . . . 88
Adjusting the seat and head restraints . . . . . . 88
Seat functions . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Transport and practical equipment . . . . . . . . . 93
Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Multi-purpose mobile storage compartment* . 96
Ashtray*, cigarette lighter* and power sockets 98
First-aid kit, warning triangle, fire extinguisher 100
Luggage compartment . . . . . . . . . . . . . . . . . . . . 101
Roof carrier/rack system* . . . . . . . . . . . . . . . . . 104
Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . . 107
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Climatic* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
2C-Climatronic* . . . . . . . . . . . . . . . . . . . . . . . . . 112
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Power steering (servotronic*) . . . . . . . . . . . . . . 117
All-wheel drive* . . . . . . . . . . . . . . . . . . . . . . . . . 117
Driving with LPG* . . . . . . . . . . . . . . . . . . . . . . . . 118
Journeys abroad . . . . . . . . . . . . . . . . . . . . . . . . . 120
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Braking and parking . . . . . . . . . . . . . . . . . . . . . 123
Manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . 126
Automatic gearbox/DSG automatic gearbox* . 127
Run-in and economical driving . . . . . . . . . . . . . 130
Driver assistance systems . . . . . . . . . . . . . . . . . 134
Braking and stability systems . . . . . . . . . . . . . . 134
Start-Stop System* . . . . . . . . . . . . . . . . . . . . . . . 138 Parking aid acoustic system* . . . . . . . . . . . . . . 140
Cruise speed* (cruise control system - CCS) . . . 142
Towing bracket device
. . . . . . . . . . . . . . . . . . . . 144
Trailer towing . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Care and maintenance . . . . . . . . . . . . . . . . . . . . 147
Accessories and technical modifications . . . . . 147
Care and cleaning . . . . . . . . . . . . . . . . . . . . . . . 148
Care of the vehicle exterior . . . . . . . . . . . . . . . . 149
Caring for the vehicle interior . . . . . . . . . . . . . . 153
Checking and refilling levels . . . . . . . . . . . . . . . 158
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
LPG system (Liquefied petroleum gas)* . . . . . . 160
Working in the engine compartment . . . . . . . . 163
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Windscreen washer reservoir . . . . . . . . . . . . . . 171
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Vehicle battery . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Wheels and tyres . . . . . . . . . . . . . . . . . . . . . . . . 175
Winter service . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Vehicle tools, spare wheel . . . . . . . . . . . . . . . . . 181
Wheel change . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Tyre repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Jump-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Towing and tow-starting . . . . . . . . . . . . . . . . . . 191
Emergency locking and unlocking . . . . . . . . . . 193
Changing the wiper blades . . . . . . . . . . . . . . . . 194
Fuses and bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 196
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Changing the lights . . . . . . . . . . . . . . . . . . . . . . 198
3

Table of Contents
Technical specifications . . . . . . . . . . . . . . . 207
Technical features . . . . . . . . . . . . . . . . . . . . . . . 207
Important information . . . . . . . . . . . . . . . . . . . . 207
Information on fuel consumption . . . . . . . . . . . 208
Towing a trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Engine specifications . . . . . . . . . . . . . . . . . . . . . 211
Dimensions and capacities . . . . . . . . . . . . . . . . 221
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
4

Dash panel
Tyre pressure  Fig. 32
Centre console: tyre monitoring sys-
tem button. The tyre pressure monitoring system controls
tyre speed and the frequency spectrum of
each tyre.
The tyre monitoring lamp
1)
compares wheel
revolutions and with it, using the ESC, the
wheel diameter of each wheel. If the diame-
ter of a wheel changes, the tyre control lamp
 lights up. The wheel diameter changes
when:
● Tyre pressure is insufficient.
● The tyre structure is damaged.
● The vehicle is unbalanced because of a
load. ●
The wheels of one axle are under more
pressure (for example, driving with a trailer or
on steep slopes).
● The vehicle is fitted with snow chains.
● The temporary spare wheel is fitted.
● The wheel on one axle is changed.
Tyre pressure adjustment
Following the modification to tyre pressure or
after changing one or more wheels, the but-
ton ››› Fig. 32 must be pressed down while
the ignition i s
on until an audible warning is
heard and the warning lamp goes out.
If the wheels are under excessive load (for ex-
ample, driving with a trailer or heavy load),
tyre pressure must be increased to the rec-
ommended value for a full load (see the
sticker on the inside of the fuel flap). If the
tyre monitor system button is pressed down,
the new tyre pressures are confirmed.
The tyre pressure control lamp  lights up
If the tyre pressure of one or more wheels is
much lower than the value set by the driver,
the tyre control warning lamp lights up ››› .The tyre pressure control lamp
 flashes
If the ty

re pressure control lamp flashes, this
indicates a fault. Go to the nearest special-
ised workshop. WARNING
● When the tyre pressure monitoring lamp
lights up, reduce speed immediately and
avoid any sudden manoeuvre or braking.
Stop when possible, and check the tyre pres-
sure and status.
● The driver is responsible for maintaining
correct tyre pressures. For this reason, tyre
pressure must be regularly checked.
● Under certain circumstances (e.g. when
driving in a sporty manner, in winter condi-
tions or on a dirt track) the tyre monitoring
lamp may light up or function incorrectly. Note
If the battery is disconnected, the yellow
warning lamp  lights up after turning the
ignition on.

This should turn off after a brief
journey. 1)
Depending on the model version
43
Technical specifications
Advice
Operation
Safety

Dash panel
Cruise speed (cruise control)*  The warning lamp 
comes on when the
c
ruise control system is switched on. For fur-
ther information on the cruise control system,
see ››› page 142
.
Indicator for open doors or boot*  This warning lamp lights up if one of the
doors is open.
The warning light
 should go off when all
the doors are closed correctly.
The system also works when the ignition is
switched off. It should disappear approxi-
mately 15 seconds after the vehicle has been
locked.
Electromechanical steering*  For vehicles with power steering, the level of
steering assistance depends on the vehicle's
speed and on the steering angle.
The warning lamp should light up for a few
seconds when the ignition is switched on. It
should go out once the engine is started.
If the battery is disconnected, the indicator
remains lit, even with the engine running. The warning light only goes off after a dis-
tance of approx. 50 m.
There is a fault in the electromechanical
steering system if the lamp does not go out
or lights up while the vehicle is in motion.
The warning lamp may appear in two differ-
ent colours to indicate faults. If the light is
yellow, it indicates a minor fault. If the light is
red, seek assistance from a specialised work-
shop immediately, as the power steering is
not working; in this case you should not keep
driving. Stop the vehicle and seek technical
assistance. The power steering does not work
if the battery is flat or if the engine is off (e.g.
for towing). You should take into account that
you will need considerably more power than
normal to steer the vehicle if the power steer-
ing is not working correctly or at all.
For those vehicles fitted with ESC*, the
“Steering manoeuvre recommendation”
››› page 134 function is included.
Emi s

sion control system*  Control lamp
 flashes:
When there is misfiring that can damage the
catalytic converter. Reduce speed and drive
carefully to the nearest specialised workshop
to have the engine checked. The instrument panel displays the following
message
1)
: EXHAUST GAS SEE WORKSHOP
.
The c ontr

ol lamp 
lights up:
If a fault has developed during driving which
has reduced the quality of the exhaust gas
(e.g. lambda probe fault). Reduce speed and
drive carefully to the nearest specialised
workshop to have the engine checked.
The instrument panel displays the following
message:
EXHAUST GAS SEE WORKSHOP .
Electronic Stability Control (ESC)*
 /. There are two control lamps for the electronic
stability control. The lamp
 provides infor-
mation concerning function and  disconnec-
tion status.
Both warning lamps light up together when
the ignition is switched on and should turn
off after approximately 2 seconds. This is the
time taken for the function check.
This programme includes the ABS, EDL and
ASR. This also includes the brake assistance
system (BAS), automatic cleaning of the
brake discs and the trailer stability pro-
gramme (TSP). »1)
Depending on the version of the model.
45
Technical specifications
Advice
Operation
Safety

Operation
Switching on front fog lights* – Pull the switch out of position  or
 to
the first stop. The symbol  of the light
control lights up.
Switching on the rear fog lights (vehicles
with front fog lights) – Pull the switch out of position  or 
to
the second stop ››› . A control lamp lights
up on the dash panel.
Switching on the rear fog lights (vehicles
with no front fog lights) – Pull the light switch from position  to the
last stop. A control lamp lights up in the
dash panel. WARNING
Never drive with just the side lights on. Risk
of accident. The side lights are not bright
enough to illuminate the road ahead and to
ensure that other road users are able to see
you. Always use your dipped beam head-
lights if it is dark or if visibility is poor. Note
● The dipped beam headlights will only work
with the ignition on. The side lights come on
automatically when the ignition is turned off.
● If the lights are left on after the key has
been taken out of the ignition lock, an audi-
ble warning will sound while the driver door remains open. This is a reminder to switch
the lights off.
● The rear fog light is so bright that it can
dazzle drivers behind you. You should use
the rear fog light only when visibility is very
poor.
● If you are towing a trailer equipped with a
rear fog light on a vehicle with a factory-fitted
towing bracket, the rear fog light on the vehi-
c l
e will automatically be switched off.
● The use of the lighting described here is
subject to the relevant statutory require-
ments.
● Depending on weather conditions (very
cold or wet), the front and rear lights and the
indicators may be temporarily misted. This
has no influence on the useful life of the
lighting system. The lights will soon demist
when they are switched on. Automatic lighting*
Fig. 59
Automatic lighting. Activation
– Rotate the switch to the position. It will
light up.
Deactivation – Turn the light switch to .
Automatic lighting
If automatic headlight control is switched on,
dipped beam headlights are automatically
switched on by a photosensor if you drive in-
to a tunnel, for example.
The rain sensor switches on the dipped beam
headlights when the windscreen wipers have
been operating continuously for a few sec-
onds and it switches the lights off when the
continuous or interval wipe is switched off for
some minutes ››› page 84.
76

Operation
panel. The control lamp
 flashes when the
t urn s
ignals are operated, provided a trailer is
correctly attached and connected to the vehi-
cle. If a turn signal bulb is defective, the con-
trol lamp flashes at double speed. If the trail-
er turn signal bulbs are defective, the control
lamp  does not light up. Change the bulb.
● The main beam headlights can only be
sw

itched on if the dipped beam headlights
are already on. The warning lamp  then
comes on in the instrument panel.
● The headlight flasher come
s on for as long
as you pull the lever – even if no other lights
are switched on. The warning lamp  then
comes on in the instrument panel.
● When the parking lights are switched on,
the he

adlight and the tail light on the corre-
sponding side of the vehicle light up. The
parking lights will only work if the key is re-
moved from the ignition. If said light is on, an
audible warning will be emitted while the
driver door is open.
● If the turn signal lever is left on after the
key has been taken out of the ignition lock,
an acoustic signal sounds when the driver
door is opened. This is intended as a remind-
er to switch off the turn signal, unless you
wish to leave the parking light on. Daytime driving lights*
Daytime running lights are signalling devices
for improving road safety. The lights are built into the headlights and come on each time
the ignition is turned on if the light switch is
in position
0 or 
. It is automatically
sw

itched off when the side lights are turned
on.
Automatic control of the dipped beam in
combination with the daytime running lights
If the dipped beam control and the daytime
running lights
are activated at the same
time, the dipped beams and the instrument
panel lighting will automatically come on as
required (e.g. when entering a tunnel) and
the daytime running lights will switch off.
When the automatic dipped beam control
switches off the dipped beams (e.g. when
coming out of a tunnel), the daytime running
lights come back on. WARNING
The side lights or daytime driving lights are
not bright enough to illuminate the road
ahead and to ensure that other road users are
able to see you.
● Always use your dipped beam head lights if
it is raining or if visibility is poor.
● The rear lights do not come on with the
daytime driving light. A vehicle which does
not have the rear lights on may not be visible
to other drivers in the darkness, if it is rain-
ing or in conditions of poor visibility. Note
Please observe any relevant legal require-
ments which may apply in your country. Nordic country solution
3 Only available in certain countries or as an
option
al

extra
The so-called “Nordic country solution” is an
alternative solution to daytime running lights
in vehicles without this function. It consists
of simultaneously connecting the dimmed
dipped beams, the sidelights and the licence
plate lights.
The aforementioned lights are switched on
each time the ignition is turned on if the light
switch is in position 0 or . Depending
upon the model, the control lamp  on the
light control switch or the instrument panel
lighting will indicate that the lights are on.
Activation of the Nordic country solution
● Remove the key from the ignition, move the
turn signal lever upward (right turn signal),
press it back to flash position and hold it
there.
● Insert the key and switch on the ignition,
holding it in this position for 3 seconds.
Then, switch off the ignition. The Nordic
country solution is now activated and the cor-
responding lights can come on.
78

Operation
– Lightly press the selector lever forward
››› Fig. 128 + to change up to a higher
gear.
– Lightly press the selector lever backward
››› Fig. 128 - to change down to a lower
gear.
Changing gear with the steering wheel
paddle levers* – Press the right paddle lever + towards the
steering wheel to change up ››› Fig. 129 .
– Pr e
ss the left paddle – towards the steer-
ing wheel to change down ››› Fig. 129 .
U s

ing the paddle levers on the steering
wheel, you can access manual driving mode
regardless of the pre-selected driving mode.
General information about driving in
tiptronic mode
When accelerating, the automatic gearbox /
DSG automatic gearbox goes into a higher
gear a little before the engine reaches its
maximum permitted revolutions.
If a lower gear is selected, the automatic
gearbox / DSG automatic gearbox will only
change down when the engine cannot go
over its maximum permitted revolutions.
If “tiptronic” is selected whilst the vehicle is
in motion and the automatic gearbox / DSG
automatic gearbox is in third gear and selec- tor lever position D, “tiptronic” mode will
then also be in third gear.
Changing gears in the normal or sport
programme using the steering wheel paddle
levers
If the paddle levers
››› Fig. 129 are used in
the normal

or sport programme, the system
switches temporarily to “tiptronic” mode. To
exit “Tiptronic” mode again, press the right
paddle shifter +OFF toward the steering
wheel for approximately one second. You will
also leave “Tiptronic” mode if the paddle lev-
ers are not moved for a certain time. Note
● The gearbox controls on the steering wheel
can operate with the selector lever in any po-
sition and with the vehicle in motion. Kick-down feature
This feature allows maximum acceleration.
If you press the accelerator down thoroughly,
the gearbox automatically changes down, de-
pending on speed and engine speed, into a
lower gear to take full advantage of give the
vehicle maximum acceleration.
The gearbox does not change gear until the
engine reaches the maximum determined en-
gine speed for the gear. WARNING
You could lose control of the vehicle if you ac-
celerate on slippery road surfaces. Risk of se-
rious injury.
● Be particularly careful when using the kick-
down features on slippery road surfaces. With
a fast acceleration, the vehicle could lose
traction and skid.
● You should use the kick-down feature only
when traffic and weather conditions allow it
to be used safely. Run-in and economical driving
Running in a new engine The engine needs to be run in over the first
1,500 km.
Up to 1,000 kilometres
– Do not drive at speeds of more than 2/3
the maximum speed.
– Do not accelerate hard.
– Avoid high engine revolutions.
– Do not tow a trailer.
130

Operation
and 120 km/h (75 mph) your vehicle will use
about 12% more fuel as a result of the extra
wind resistance caused by the roof rack even
when it is not in use.
Save electricity
The engine activates the alternator, which
produces electricity. With the need for elec-
tricity, fuel consumption is also increased.
Because of this, always turn off electrical de-
vices when you do not need them. Examples
of devices that use a lot of electricity are: the
fan at high speeds, the rear window heating
or the seat heaters*. Note
● If you vehicle has Start-Stop, it is not rec-
ommended t o sw
itch this function off.
● It is recommended to close the windows
when driving at more than 60 km/h
● Do not drive with your foot resting on the
clutch pedal,, as the pressure can make the
pl

ate spin, more fuel will be used and it can
burn the clutch plate lining, causing a serious
fault.
● Do not hold the vehicle on a hill with the
clutch, use the foot brake or hand brake, us-
ing the latter to start. The fuel consumption
will be lower and you will prevent the clutch
plate from being damaged.
● On descents, use the engine brake, chang-
ing to the gear that is more suitable for the slope. Fuel consumption will be “zero” and
the brakes will not suffer.
Driver assistance systems
Braking and stability systems Electronic Stability Control (ESC)* Fig. 131
Detailed view of the centre console:
ESC switch. This Electronic Stability System reduces the
risk of skidding and improves the vehicle's
stability and ability to hold the road.
Electronic Stability Control (ESC) includes the
electronic differential lock (EDL), the traction
control system (TCS), the brake assist system
(BAS) and the trailer stabilisation programme
(TSP). The ESC works together with the ABS.
Both control lamps will light up if the ESC or
ABS systems are faulty.
The ESC system is started automatically
when the engine is started.
134

Driver assistance systems
The ESC system is always active and cannot
be switched off. The ESC switch only switches
the ASR off.
The ASR can be deactivated when wheel spin
is desirable.
For example:
● When driving with snow chains.
● When driving in deep snow or on loose sur-
faces.
● When the vehicle is stuck, to rock it back-
wards and forwards.
Press the button to switch the ASR back on
when you no longer need wheel spin.
Electronic Stability Control (ESC)*
The ESC reduces the risk of skidding by brak-
ing the wheels individually.
The system uses the steering wheel angle
and road speed to calculate the changes of
direction desired by the driver, and constant-
ly compares them with the actual behaviour
of the vehicle. When irregularities occur, for
example, if the vehicle begins to skid, the
ESC brakes the appropriate wheel automati-
cally.
The forces acting on the braked wheel bring
the vehicle back to a stable condition. If the
vehicle tends to oversteer (the rear end
slides out), the system will act on the front
wheel on the outside of the turn. Steering manoeuvre recommendations
This is a complementary safety function in-
cluded in the ESC. This function aids the driv-
er to better stabilize the vehicle in a critical
situation. For example, in case of sudden
braking on a surface with varied adherence,
the vehicle will tend to destabilise its trajec-
tory to the right or to the left. In this case, the
ESC recognises the situation and assists the
driver with a counter steering manoeuvre
from the power steering.
This function simply provides the driver with
a recommended manoeuvre in critical situa-
tions.
The vehicle does not steer itself with this
function, the driver has full control of the ve-
hicle at all times.
WARNING
● Remember that not even the ESC can defy
the laws of physics. This should be kept in
mind, particularly on slippery and wet roads
and when towing a trailer.
● Always adapt your driving style to suit the
condition of the roads and the traffic situa-
tion. The greater safety provided by the ESC
should not encourage you to run any risks. CAUTION
● To ensure that the ESC works correctly, all
four wheels must be fitted with the same
tyres. Any differences in the rolling radius of the tyres can cause the system to reduce en-
gine power when this is not desired.
● Any modifications made to the vehicle (for
example, to the engine, brake system, run-
ning gear or to the combination of wheels
and tyres) may affect the operation of the
ABS, EDL, ESC and ASR. Electronic differential lock (EDL)*
EDL helps the vehicle to start moving, accel-
erate and climb a gradient in slippery condi-
tions where this may otherwise be difficult or
even impossible.
It uses the ABS sensors to monitor the speed
of the driven wheels. In case of an EDL fault,
the warning light for ABS lights up
››› page 41 .
At s
peeds of up to approximately 80 km/h
(50 mph), it is able to balance out differences
in the speed of the driven wheels of approxi-
mately 100 rpm/min caused by a partially
slippery road surface. It does this by braking
the wheel which has lost traction and distrib-
uting more driving force to the other driven
wheel via the differential.
To prevent the disc brake of the braking
wheel from overheating, the EDL cuts out au-
tomatically if subjected to excessive loads.
The vehicle will continue to function normally »
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Technical specifications
Advice
Operation
Safety

Driver assistance systems
brake on gravel or on fresh snow on a
slippery surface. WARNING
● The anti-lock brake system cannot defy the
laws of physics. Slippery and wet roads are
dangerous even with ABS! If you notice that
the ABS is working (to counteract locked
wheels under braking), you should reduce
speed immediately to suit the road and traffic
conditions. Do not let the extra safety fea-
tures tempt you into taking any risks when
driving.
● The effectiveness of ABS is also determined
by the tyres fitted ››› page 175.
● If the ru
nning gear or brake system is modi-
fied, the effectiveness of the ABS could be se-
verely limited. Drive wheel traction control system
(ASR)
The traction control system prevents the driv-
en wheels from spinning when the vehicle is
accelerating.
Description and operation of the traction
control system during acceleration (ASR
On front-wheel drive vehicles, the ASR sys-
tem intervenes, reducing engine power and
preventing the driven wheels from slipping
during acceleration. The system works in the entire speed range in conjunction with ABS.
If a failure occurs in the ABS, the ASR will al-
so stop working.
TCS helps the car to start moving, accelerate
and climb a gradient in slippery conditions
where this may otherwise be difficult or even
impossible.
The ASR automatically switches on when the
engine is started. If necessary, it may be
turned on or off by briefly pushing the button
on the centre console.
When the ASR is switched off, the
 OFF warning lamp will light up. The ASR should
normally be left on. Only in exceptional cir-
cumstances, when slipping of the wheels is
desired, should it be disconnected.
●
With compact temporary spare wheel.
● When using the snow chains.
● When driving in deep snow or on soft ter-
rain.
● When the vehicle is bogged-down, to free it
by “rocking.”
The ASR should be switched on again as
soon as possible. WARNING
● Remember that not even the ASR can defy
the laws of physics. This should be kept in
mind, particularly on slippery and wet roads
and when towing a trailer. ●
Always adapt your driving style to suit the
condition of the roads and the traffic situa-
tion. The greater safety provided by the ASR
should not encourage you to run any risks. CAUTION
● To ensure that the ASR works correctly,
identical tyres should be fitted on all four
wheels. Any differences in the rolling radius
of the tyres can cause the system to reduce
engine power when this is not desired.
● Any modifications made to the vehicle (for
example, to the engine, brake system, run-
ning gear or to the combination of wheels
and tyres) may affect the operation of the
ABS and ASR. XDS*
When taking a curve, the driveshaft differen-
tial mechanism allows the outer wheel to turn
at a higher speed than the inner wheel. In
this way, the wheel that is turning faster (out-
er wheel) receives less drive torque than the
inner wheel. This may mean that in certain
situations the torque delivered to the inner
wheel is too high, causing the wheels to
spin. On the other hand, the outer wheel is
receiving a lower drive torque than it could
transmit. This causes an overall loss of lateral
grip on the front axle, resulting in understeer
or “lengthening” of the trajectory.
»
137
Technical specifications
Advice
Operation
Safety