Intelligent Technology
137
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Driving TipsIntelligent TechnologyElectronic stability programme (ESP)*GeneralGeneral The ESP aids you in maintaining control of
your vehicle in situations in which the
vehicle is driving at its dynamic limits, such as
entering a curve fast. The risk of skidding
is reduced and your vehicle thus offers greater driving stability depending on the conditions of the road surface. The system operates at all speeds. The following systems are integrated into the electronic stability programme:
Electronic Differential Lock (EDL);
Traction control system (TCS);
Antilock brake system (ABS);
Brake Assist;
Uphill Start Assist.
Operating principle The ESP switches on automati
cally when the engine is started and then conducts a
self-test. The ESP control unit processes data from the individual systems. It also proc- esses additional measurement data which are supplied by highly sensitive sensors: the rotational velocity of the vehicle about its ve
rtical axis, the lateral acceleration of the
vehicle, the braking pressure and the steering angle. The direction which the driver wishes to take is determined based on the steering angle and the speed of the vehicle and is co
nstantly compared wi
th the actual behav-
iour of the vehicle. If differences exist, such
as the vehicle beginning to skid, the ESP will
automatically brake the appropriate wheel. The car is stabilised again by the forces wh
ich take effect when the wheel is braked.
Intervention into the brake system takes place primarily on the outer front wheel of a vehicle which tends to oversteer (tendency fo
r the rear of the vehicle to break away)
while occurs this is on the inner rear wh
eel of a vehicle whic
h tends to understeer
(tendency to shift out of the curve). This braking control cycle is accompanied by noises. If the ESP helps to stabilise the vehicle (f
or example when applying and releasing a
braking force to an individual wheel), then the indicator light
flashes.
The ESP system cannot be switched off, only
the TCS system can be switched off by
pressing the button
page 138, fig. 130
. The warning light
page 31 lights up if
the TCS system is switched off. The warning light
lights up permanently if there is a fault in the ESP system.
The fact that the ESP system operates together with the ABS means that the ESP warning light will also come on if the ABS system is not operating properly. If the warning light
comes on immediately after starting the engine, the ESP system
can be switched off for technical reasons. In
this case, the ESP system can be switched
on again by switching the igni
tion on and off. If the warning light goes out, the ESP
system is fully functional again.
WARNING
It is also not possible for the ESP to overcome the physical limits of the vehicle. Even if a vehicle fitted with ESP you should still always adapt your style of driving to the condition of the road surfac
e and the traffic situation. This partic-
ularly applies when driving on slippery
and wet roads. The increased safety
offered must not tempt you to take greater risks than otherwise - risk of an acci- dent!
Note
All four wheels must be fitted with the same tyres in order to achieve problem-free
operation of the ESP. Differing rolling circum
ferences of the tyres can lead to an unde-
sirable reduction in the engine output.
s3j8.a.book Page 137 Tuesday, April 20, 2010 1:10 PM
Intelligent Technology
138
Changes to vehicle (e.g. on engine, on th
e brakes, on chassis or another combina-
tion of tyres and wheels) can influence the function of the ESP
page 184, “Accesso-
ries, changes and replacement of parts”.Traction control system (TCS)* The traction control system prevents the driven wheels from spinning when accelerating.General The TCS makes it much easier, and sometimes at all possible, to start off, accelerate and climb a steep hill when the conditions
of the road surface are unfavourable.
Operating principle The TCS switches on automatically when th
e engine is started and then conducts a
self-test. The system monitors the speeds of the driven wheels with the aid of the ABS sensors. If the wheels are spinning, the force transmitted to the road surface is auto- matically adapted by reducing the engine speed. The system operates at all speeds. The TCS operates in combination with the ABS
page 140, “Antilock brake system
(ABS)”. The TCS will not function if a fault exists in the ABS system. The TCS warning light lights up in the instru
ment cluster when there is a fault on the
TCS
page 31.
Switching off You can switch the TCS off and on agai
n as you wish by pressing the button
fig. 130
.
The TCS warning light lights up in the instrument cluster when the TCS is switched off page 31.
The TCS should normally always
be switched on. It may be good practice in certain
exceptional cases, such as when you wish to
have wheel slip, to switch off the system.
Examples:
when driving with snow chains;
when driving in deep snow or on a loose surface;
when it is necessary to rock a vehicle when it has become stuck.
then you should switch on the TCS again.
WARNING
You should always adjust your style of driving to the conditions of the road surface and the traffic situation. The increased safety offered must not tempt you to take greater risks than otherwise - risk of an accident!
Note
All four wheels must be fitted with the same tyres in order to achieve problem-free
operation of the TCS. Differing rolling circum
ferences of the tyres can lead to an unde-
sirable reduction in the engine output.
Changes to vehicle (e.g. on engine, on the brakes, on chassis or another combina-
tion of tyres and wheels) can influence the function of the TCS
page 184, “Accesso-
ries, changes and replacement of parts”.Electronic Differential Lock (EDL)* The electronic differential lock prev
ents an individual wheel from slip-
ping.Models fitted with ESP are equipped with
electronic differential lock (EDL).
Fig. 130 TCS switch
s3j8.a.book Page 138 Tuesday, April 20, 2010 1:10 PM
Intelligent Technology
139
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
General The EDL makes it much easier, and sometimes
at all possible, to start off, accelerate
and climb a steep hill when the conditions of the road surface are unfavourable. Operating principle The EDL is activated automaticall
y, that is without any action on the part of the driver.
It monitors the speeds of the driven wheels with the aid of the ABS sensors. Should only
one
drive wheel begin spinning on a slippery surface there will be an appreciable
difference in the speed of the driven wheels. The EDL function brakes the slipping wheel and the differential transmits a greate
r driving force to the other driven wheel.
This control process is also accompanied by noises. Overheating of the brakes The EDL switches off automatically if unusually severe stresses exist in order to avoid excessive heat generation in the disc brake on the wheel which is being braked. The vehicle can continue to be driven and has
the same characteristics as a vehicle not
fitted with EDL. The EDL switches on again automatically as soon as the brake has cooled down.
WARNING
Carefully depress the accelerator when accelerating on uniformly slippery
road surfaces, such as ice and snow. The driven wheels might still spin despite the EDL and affect the stability of
the vehicle - risk of an accident!
You should always adapt your style of driving to the condition of road
surface and to the traffic situation even
when your vehicle is fitted with EDL.
The increased safety offered must not tempt you to take greater risks than otherwise - risk of an accident!
Note
If the ABS or TCS or ESP warning light comes on, this may also indicate a fault in the
EDL. Please have the vehicle inspected as
soon as possible by a specialist garage.
Changes to vehicle (e.g. on engine, on th
e brakes, on chassis or another combina-
tion of tyres and wheels) can in
fluence the function of the EDL
page 184, “Accesso-
ries, changes and replacement of parts”.
BrakesWhat has a negative effect on braking efficiency?Wear-and-tear Wear-and-tear to the brake pa
ds is greatly dependent on
the operating conditions of
the vehicle and your style of driving. Particularly if you drive a great deal in towns and over short distances or if you adopt a sporty
style of driving, it may be necessary to
have the thickness of the brake pads insp
ected at a specialist garage between the
service inspections. Wet roads or road salt There may be a certain delay before the brakes
take full effect un
der certain conditions
such as when driving through water, during
heavy rain showers or
after the vehicle has
been washed in an automatic vehicle wash
, since the brake discs and brake pads may
be moist or even have a coating of ice on them in winter. You should dry the brakes as soon as possible by applying and
releasing the brakes several times.
There also may be a certain delay before the
full braking efficiency is available when
driving on roads which have been treated with
road salt if you have not used the brakes
for some considerable time beforehand. The
layer of salt on the brake discs and brake
pads must first be rubbed off when you apply the brakes. Corrosion Corrosion on the brake discs and dirt on th
e bake pads occur if
the vehicle has been
parked for a long period and if you do
not make much use of the braking system.
We recommend cleaning the brake discs by firm
ly applying the brakes at a fairly high
speed if you do not make much use of the braking system or if surface corrosion is present
.
Faults in the brake surface If you notice that the braking distance has
suddenly become longer and that the brake
pedal can be depressed further, it is possib
le that a brake circuit of the dual-circuit
brake system has failed. Drive, in such cases, to the nearest specialist garage without delay in order to have the problem rectified. Drive at a reduced speed while on your way to the dealer and adapt your style of
driving to the higher brake pedal pressure
required.
s3j8.a.book Page 139 Tuesday, April 20, 2010 1:10 PM
Index 236
Children and safety . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Chrome parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Climatronic
Defrosting windows . . . . . . . . . . . . . . . . . . . . . . . . 88
Setting temperature . . . . . . . . . . . . . . . . . . . . . . . . 88
Climatronic (automatic air conditioning) . . . . . . . . 86
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Clothes hooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Cockpit
General view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Convenience operation . . . . . . . . . . . . . . . . . . . . . . . . 45
Converting/masking over headlights . . . . . . . . . . 150
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
replenishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Coolant level
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Coolant quantity
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Coolant temperature gauge . . . . . . . . . . . . . . . . . . . . 16
Coolant temperature/coolant level
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Cornering light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Correct seated position . . . . . . . . . . . . . . . . . . . . . . 114
Counter for distance driven . . . . . . . . . . . . . . . . . . . . 17
Cruise control system . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Cup holder
front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
DDash panel insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Daylight driving lights . . . . . . . . . . . . . . . . . . . . . 48, 202
Deactivating an airbag . . . . . . . . . . . . . . . . . . . . . . . 128
Defrosting rear window . . . . . . . . . . . . . . . . . . . . . . . 54
De-icing the windows . . . . . . . . . . . . . . . . . . . . . . . . 157
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Diesel engines
Starting the engine . . . . . . . . . . . . . . . . . . . . . . . . 91
Diesel particle filter . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Digital clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Direction indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Distance driven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Door
Child safety lock . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Driving economically . . . . . . . . . . . . . . . . . . . . . . . . 146
Driving time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20EEDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Electric power-operated window
Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . 45Electric sliding/tilting roof . . . . . . . . . . . . . . . . . . . . . 46
Electrical power windows . . . . . . . . . . . . . . . . . . . . . 44
Electrically adjustable rear mirror . . . . . . . . . . . . . . 57
Electronic Differential Lock . . . . . . . . . . . . . . . . . . . 138
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electronic Differential Lock (EDL) . . . . . . . . . . . . . 138
Electronic immobiliser . . . . . . . . . . . . . . . . . . . . . . . . 36
Electronic stability programme (ESP) . . . . . . . . . . 137
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Emergency locking of the door . . . . . . . . . . . . . . . . . 39
Engine
starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Engine compartment
Safety information . . . . . . . . . . . . . . . . . . . . . . . . 166
Engine electronics
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
replenishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Engine revolutions counter . . . . . . . . . . . . . . . . . . . . 15
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Environmental compatibility . . . . . . . . . . . . . 146, 149
ESP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Exhaust gas
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Exhaust gas inspection
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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