Starting-off and Driving
92WARNING
The parking aid is not a substitute for the driver paying proper attention and
it is always the driver's responsibility to take care when parking the vehicle or
carrying out similar manoeuvres.
You should therefore satisfy yourself, before reversing, that there is no
small obstacle, such as a rock, thin post, trailer drawbar etc., behind your
vehicle. Such an obstacle might not be within the range detected by the
sensors.Note
The parking aid does not operate if you are towing a trailer (applies to models
which feature a factory-fitted towing device*).
If a warning signal sounds for about 3 seconds after switching the ignition on and
engaging reverse gear, and there is no obstac le close to your vehicle, this indicates a
system fault. Have the fault rectified by a specialist workshop.
The sensors must be kept clean and free of ice to enable the parking aid to operate
properly.
Cruise control system (CCS)*IntroductionThe cruise control system (CCS) maintains a constant speed, more than 30 km/h (20
mph), once it has been set, without you havi ng to depress the accelerator pedal. This
is only possible within the range which is permitted by the power output and braking
power of the engine. The cruise control system makes it possible - particularly on long
journeys - for you to rest your “accelerator foot”.
WARNING
For safety reasons, the cruise control system must not be used in dense
traffic or on unfavourable road surfaces (such as icy roads, slippery roads,
loose gravel) - ri sk of accident!
In order to prevent unintentional use of the cruise control system, always
switch off the system after use.Note
Mode ls fi tted with a manual gea rbox: Alwa ys depress the clutch pedal if you switch
on the cruise control system when the gearbox is in Neutral! Otherwise the engine can
rev up unintentionally.
The cruise control system is not able to maintain a constant speed when driving on
steep downhill sections. The weight of the vehicle increases the speed at which it
travels. One should shift down in good time to a lower gear or slow the vehicle down
by applying the foot brake.
Storing a speedThe cruise control system is operated by means of the slide switch and rocker
button in the left lever of the multi-functional switch.
– Switch on the cruise control system by sliding the switch fig. 104 into the ON
position.
– After the desired speed has been reached, briefly press the rocker button in the SET position.
WARNING (continued)
Fig. 104 Operating lever: Rocker
button and switch of the cruise
control system
AA
AB
AA
AB
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Intelligent Technology123
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.
Operating principle
The ESP switches on automatically when the engine is started and then conducts a self-
test. The ESP control unit processes data from the individual systems. It also processes additional measurement data which are supplied by highly sensitive sensors: the rota-
tional velocity of the vehicle about its vert
ical 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 with the actual behav-
iour of the vehicle. If differences exist, such as the vehi cle 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 for the rear of the vehicle to break away)
while occurs this is on the inner rear wh eel of a vehicle which tends to understeer
(tendency to shift out of the curve). This braking control cycle is accompanied by
noises.
The ESP operates in combination with the ABS page 126, “Antilock brake system
(ABS)*”. If there is a fault in the ABS system, the ESP also does not operate.
The ESP warning light lights up in the instrument cluster when there is a fault on the
ESP page 31.
Switching off
You can switch the ESP off and on agai n as you wish, by pressing the button fig. 134 .
The ESP warning light lights up in the instrument cluster when the system is switched
off page 31.
The ESP 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 ESP again.
Fig. 134 ESP switch
s2rc.book Page 123 Thursday, April 22, 2010 10:58 AM
Intelligent Technology
124WARNING
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 surface 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.
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 166, “Accesso-
ries, changes and replacement of parts”.
Electronic Differential Lock (EDL)*
The electronic differential lock prev ents an individual wheel from slip-
ping.Vehicles fitted with ABS* can be equipped with electronic differential lock (EDL).
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 automatica
lly if unusually severe stresses exist in order to avoid
excessive heat generation in the disc brak e 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. Th e 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 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 the brakes, on chassis or another combina-
tion of tyres and wheels) can influence the function of the EDL page 166, “Accesso-
ries, changes and replacement of parts”.
s2rc.book Page 124 Thursday, April 22, 2010 10:58 AM
Intelligent Technology125
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
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 126, “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 again as you wish by pressing the button fig. 135 .
The TCS warning light lights up in the instru ment cluster when the system 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 circumferences 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 166, “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
Fig. 135 TCS switch
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Fuses and light bulbs179
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Fuse assignment in engine compartment - version 2Certain electrical components are only standard on certain vehicle model versions or
only suppliable as optional equipment for certain models.
Fuse assignment in the dash panelCertain electrical components are only stan dard on certain vehicle model versions or
only suppliable as optional equipment for certain models.
No.
Power consumer
Amperes
1
Pump for ABS
30
2
Va lve s for AB S
30
3
Radiator fan 1st stage
30
4
Glow plugs for heating the coolant, relay for secondary air
pump
50
5
Engine control unit
50
6
Radiator fan 2nd stage
40
7
Main fuse of the interior
110
8
Dynamo
110 / 150
a)
a)Depending on the engine type and equipment.
Fig. 172 Schematic representa-
tion of fuse box in engine
compartment - version 2
No.
Power consumer
Amperes
1
Heating of the exterior mirrors, relay for cigarette lighter,
power seats and washing nozzles
10
2
Turn signal lights, Xenon headlight
10
3
Lighting in storage compartment
5
4
Licence plate light
5
5
Seat heating, Climatronic, circulating air flap, exterior mir-
ror heater, cruise control system
7,5
6
Central locking system
5
7
Reversing light, sensors for parking aid
10
8
Phone
5
9
ABS, ESP
5
10
Ignition, S-contact
a)
10
11
Instrument cluster
5
12
Power supply of the self-diagnosis
7,5
Fig. 173 Schematic representa-
tion of the fuse carrier in the
dash panel
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