Antilock Braking System (ABS)First read and observe the introductory information and safety warn-
ings
on page 150.
ABS prevents the wheels locking when braking. Thus helping the driver to main-
tain control of the vehicle.
The intervention of the ABS is noticeable from the pulsating movements of the
brake pedal which is accompanied by noises.
When the ABS system is active, do not brake periodically or reduce the pressure
on the brake pedal.
Traction Control System (TCS)
Fig. 131
TCS button
First read and observe the introductory information and safety warn- ings on page 150.
If the wheels are slipping, the TCS adapts the engine speed to the conditions of
the road surface. The TCS makes it much easier to start off, accelerate and climb
steep hills even if the conditions of the road surface are unfavourable.
The TCS function is activated automatically each time the ignition is switched on.
If your vehicle is fitted with the ESC system, the ASR is integrated into the ESC
system » page 150 .
During an intervention of the system, the TCS indicator light flashes in the in-
strument cluster.
The TCS should normally always be enabled. The system should be deactivated
only in the following situations, for example.
› When driving with snow chains.
› When driving in deep snow or on a very loose surface.
› When “rocking a car free” when it has become stuck.
The ASR can be deactivated via the symbol button » Fig. 131
.
The warning light lights up in the instrument cluster when the ASR is deactiva-
ted.
Ensure the TCS is activated again afterwards.
Electronic Differential Lock (EDL)
First read and observe the introductory information and safety warn-
ings
on page 150.
If one of the wheels starts to spin, the EDL system brakes the spinning wheel and transfers the driving force to the other wheels. This ensures the stability of the
vehicle and a quick journey.
The EDL switches off automatically in order to avoid excessive heat generation in
the disc brake of the wheel 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.
Driver Steering Recommendation (DSR)
First read and observe the introductory information and safety warn-ings
on page 150.
In critical situations, the DSR provides the driver with a steering recommendation in order to stabilise the vehicle. The DSR is activated, for example, on the right
and left vehicle side when braking sharply on different road surfaces.
Hydraulic Brake Assist (HBA)
First read and observe the introductory information and safety warn-ings
on page 150.
The HBA increases the braking effect and helps to reduce the braking distance.
151Assist systems
The parking procedure was ended because TCS was deactivated during the park-
ing procedure.
Trailer: Park Assist stopped.
The parking procedure cannot be carried out because a trailer is hitched. Time limit exceeded. Take over steering!
The parking procedure was ended because the time limit of 6 minutes was passed.
Park Assist currently not available.
The system cannot be activated because a fault exists on the vehicle. Seek help
from a specialist garage.
Park Assist stopped. System currently not available.
The parking procedure was ended because a fault exists on the vehicle. Seek help
from a specialist garage.
Park Assist faulty. Workshop!
The parking procedure is not possible because a fault exists in the system. Seek help from a specialist garage.
Park Assist stopped. Take over steering!
Assume control of the steering. Complete the parking procedure without using the system.
ASR intervention. Take over steering!
The parking procedure is terminated by a TCS intervention.
PARK ASSIST Turn on turn signal and select reverse gear
The prerequisites for manoeuvring out of a parking space using the system have
been met. Switch on the turn signals and shift into reverse.
Please take over steering and drive on.
The manoeuvring procedure out of a parallel parking space has ended. Assume control of the steering.
Automatic space departure not possible. Space too small.
The manoeuvring procedure using the system is not possible. The parking gap is
too small.
Park Assist: Brake interv. Speed too high.The driving speed during the parking procedure was too high - automatic brake
assist is initiated.
Cruise Control System
Introduction
This chapter contains information on the following subjects:
Activating/deactivating
158
Storing and maintaining speed
158
Changing the stored speed
158
Switching off temporarily
158
The Cruise Control System (CCS) maintains a set speed, more than 25 km/h, with-
out you having to actuate the accelerator pedal.
This is only possible within the range which is permitted by the power output and
braking power of the engine.
The warning light
illuminates in the instrument cluster when the cruise control
system is switched on.
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) – risk of accident!■
The saved speed may only be resumed if it is not too high for the current
traffic conditions.
■
Always deactivate the cruise control system after use to prevent the system
being switched on unintentionally.
CAUTION
■ The cruise control system is not able to maintain a constant speed when driving
in areas with steeper gradients. The weight of the vehicle increases the speed at which it travels. In such cases, select a lower gear or brake the vehicle using the
footbrake.■
The cruise control system cannot be activated when first gear or reverse gear is
selected (vehicles with manual transmission).
157Assist systems
■The cruise control system cannot be activated when the selector lever is in po-
sitions P , N or R (vehicles with automatic transmission).■
The cruise control system may automatically switch off when some brake assist
systems (e.g. ESC) intervene, when the maximum permissible engine speed is ex-
ceeded, etc.
Activating/deactivating
Fig. 135
Operating lever: Cruise control
system controls
First read and observe the introductory information and safety warn-
ings on page 157.
Activating
›
Move switch
A
» Fig. 135 into the ON position.
Deactivating
›
Move switch
A
» Fig. 135 into the OFF position.
Storing and maintaining speed
First read and observe the introductory information and safety warn-
ings
on page 157.
›
Activate the cruise control system » page 158.
›
Drive at the desired speed.
›
Push the rocker button
B
into the SET/- » Fig. 135 on page 158 position.
After you have released the rocker button
B
from the SET/- position, the speed
you have just stored is kept constant without having to depress the accelerator.
Changing the stored speed
First read and observe the introductory information and safety warn-
ings
on page 157.
Increasing the speed with the rocker button
B›
Push the rocker button
B
into the RES/+ » Fig. 135 on page 158 position.
If the rocker button is held in the RES/+ position, the speed will increase continu-
ously. Release the rocker button once the desired speed is reached. The set
speed is then stored in the memory.
Decreasing the speed using the rocker button
B
The stored speed can be reduced by pushing the rocker switch
B
into the
SET » Fig. 135 on page 158 position.
If the rocker button is pressed and held in the SET/- position, the speed will de-
crease continuously. Release the rocker button once the desired speed is
reached. The set speed is then stored in the memory.
If the rocker button is released at a speed of less than approx. 25 km/h, the speedis not stored and the memory is erased. Once the speed of the vehicle has in-
creased to more than approx. 25 km/h, the speed must then be stored again by
pushing the rocker button
B
into the SET/- position.
Increasing the speed with the accelerator
›
Depress the accelerator pedal.
Releasing the accelerator pedal will cause the speed to drop again to the set
speed.
Decreasing the speed with the brake pedal
The speed can also be reduced by depressing the brake pedal, which temporarily
deactivates the system » page 158.
Switching off temporarily
First read and observe the introductory information and safety warn-
ings
on page 157.
The cruise control system can be temporarily deactivated by pushing the switch
A
» Fig. 135 on page 158into the spring-mounted CANCEL position or by depress-
ing the brake or clutch pedal.
The set speed remains stored in the memory.
158Driving
Briefly push the rocker button B into the RES/+ position in order to resume the
stored speed after the clutch or brake pedal is released.
START-STOP
Introduction
This chapter contains information on the following subjects:
Starting/shutting down the engine
159
Operating conditions of the system
160
Manually activating/deactivating the system
160
Information messages
161
The START-STOP system helps you to save fuel while at the same time reducing
harmful exhaust emissions and CO 2 emissions.
The function is automatically activated each time the ignition is switched on. In the start-stop mode, the engine automatically switches to the vehicle's idle phase, e.g. when stopped at traffic lights. The engine restarts automatically
where necessary.
The system can work only if the following basic conditions are met. The driver's door is closed.
The driver has fastened the seat belt.
The bonnet is closed.The driving speed was higher than 4 km.h after the last stop.
No trailer is coupled.
WARNING■ The brake servo unit and power steering only operate if the engine is run-
ning.■
Never let the vehicle roll with the engine switched off.
CAUTION
Always deactivate the START-STOP system before driving through wa-
ter » page 148 .Note■
If the driver's seat belt is removed for more than approx. 30 seconds or the driv-
er's door is opened during stop mode on vehicles with manual transmission or au- tomatic transmission (when the selector lever in position P), the engine must be
started manually » page 133.■
After manually starting the engine on vehicles with manual transmission, auto-
matic engine shut down is not possible until the vehicle has travelled the re-
quired minimum distance for START-STOP mode.
■
If, on vehicles with automatic transmission, the selector lever positions D, S or N
are selected after driving in reverse, the vehicle will first need to achieve a speed
of over 10 km/h before automatic engine shut down can take place again.
■
Changes to the outdoor temperature can have an effect on the internal temper-
ature of the vehicle battery even after several hours. If the vehicle remains out-
doors for a long time in minus temperatures or in direct sunlight, it can take sev-
eral hours until the internal temperature of the vehicle battery reaches a suitable temperature for proper operation of the START STOP system.
■
If Climatronic is running in automatic mode, the engine may not switch off auto-
matically under certain conditions.
Starting/shutting down the engine
First read and observe the introductory information and safety warn-ings
on page 159.
Vehicles with manual transmission
›
Stop the vehicle (where necessary, apply the handbrake).
›
Put the gear stick into Neutral.
›
Release the clutch pedal.
Automatic engine shut down (STOP phase) takes place. The warning symbol
appears in the instrument cluster display.
›
Depress the clutch pedal.
The automatic start procedure takes place again (START phase). The warning
symbol
goes out.
Vehicles with automatic transmission
›
Bring the vehicle to a stop and depress the brake pedal.
Automatic engine shut down takes place. The warning symbol
appears in the
instrument cluster display.
›
Release the brake pedal.
159Assist systems
The automatic start procedure takes place again. The warning symbol goes
out.
Further information on automatic transmission Engine shut down takes place when the selector lever is in positions P, D , S and N
and in Tiptronic mode.
When the selector lever is in position P, the engine remains shut down even after
you release the brake pedal. Start the engine by pressing the gas pedal or by moving the selector lever into a different mode and releasing the brake pedal.
If the selector lever is moved into position R during the STOP phase , the engine
will re-start.
No automatic engine shutdown takes place when the vehicle is moving at low speed (e.g. during a traffic jam or when tuning) and remains stationary after
pressing the brake pedal lightly. Automatic engine shutdown takes place if you
press the brake pedal down with more force.
Operating conditions of the system
First read and observe the introductory information and safety warn-ings
on page 159.
The START-STOP system is very complex. Some of the procedures are hard to check without servicing.
No engine shut down is carried out
Before each STOP phase, the system checks whether certain conditions have
been met. No engine shut down takes place in the following situations.
› The engine has not reached the minimum temperature for the START STOP
mode.
› The temperature inside the vehicle has not reached the temperature set in the
air-conditioning system.
› The external temperature is very low/high.
› The intensive windscreen heater (Climatronic) or windscreen heater/ventilation
is switched on with the maximum air temperature setting (manual air condition-
ing system).
› The parking aid/Park Assist is switched on.
› The charge state of the vehicle battery is too low.
› The stationary vehicle is on a steep slope or a steep downhill section.
› The idling speed is too high.
› The steering angle is too large (manoeuvring).
› The selector lever position
R is selected (e.g. when parking).
The warning symbol appears in the instrument cluster display.
The automatic start procedure takes place again
During the STOP phase, the engine fires up without any active driver intervention, e.g. in the following situations.
› The vehicle begins to roll, e.g. on a slope.
› The difference between the temperature setting of the air-conditioning system
and the inside temperature is too large.
› The intensive windscreen heater (Climatronic) or windscreen heater/ventilation
is switched on with the maximum air temperature setting (manual air condition-
ing system).
› The brake pedal was pressed several times (the pressure in the braking system
is too low).
› The charge state of the vehicle battery is too low.
› The current consumption is too high.
Manually activating/deactivating the system
Fig. 136
Button for the START-STOP sys-
tem
First read and observe the introductory information and safety warn-
ings on page 159.
Activation/deactivation
›
Press the symbol button
» Fig. 136 .
When start-stop mode is deactivated, the indicator light in the button lights up.
Note
If the system is deactivated during the STOP phase, the automatic start proce-
dure takes place.
160Driving
Information messagesFirst read and observe the introductory information and safety warn-
ings
on page 159.
The messages and information are indicated in the instrument cluster display.
Start the engine manually!
START MANUALLY
The driver sees this message when the conditions for the automatic start proce-
dure are not met during the STOP phase. The engine must be started manual-
ly » page 135 .
Error: start-stop system
ERROR START-STOP
Error in the START-STOP system. Seek help from a specialist garage.
Fatigue detection (break recommendation)
Introduction
This chapter contains information on the following subjects:
Function
161
Information messages
161WARNING■ For the driving ability is always the driver's responsibility. Never drive if you
feel tired.■
The system may not detect all cases where a break is needed.
■
Therefore, take regular, sufficient breaks during long trips.
■
There will be no system warning during the so-called micro-sleep.
Note
■ In some situations, the system may evaluate the driving incorrectly and thus
mistakenly recommend a break (e.g. sporty driving, adverse weather conditions or poor road conditions).■
The fatigue detection system is designed primarily for motorway driving.
Function
First read and observe the introductory information and safety warn-ings
on page 161.
The fatigue detection system advises the driver on the basis of information about
the steering behaviour, to take a break from driving. The system recommends a
break at speeds of 65-200 km/h.
After the ignition has been switched on, the system evaluates the steering be-
haviour for 15 minutes. This baseline analysis is constantly compared with the
current steering behaviour.
If the system detects deviations from normal steering behaviour due to possible
fatigue of the driver, it recommends to take a break from driving.
The system deletes the stored baseline analysis if one of the following condi-
tions is met.
› The vehicle is stopped and the ignition switched off.
› The vehicle is stopped, the seat belt removed and the driver's door opened.
› The vehicle is stopped for more than 15 minutes.
If none of these conditions are met or if the driving style is not changed, the sys-
tem recommends a driving break again after 15 minutes.
Activation/deactivation
The system can be activated/deactivated via the MAXI DOT display in the Wizards
menu option » page 28.
Information messages
First read and observe the introductory information and safety warn-
ings
on page 161.
The symbol will appear in the MAXI DOT display for a few seconds, along with
the following message.
Fatigue detected. Take a break.
An audible signal is also emitted.
161Assist systems
The engine output falls as altitude increases, as does the vehicle's climbing pow-
er. Therefore, for every additional 1000 m in height (or part), the maximum per-
missible towed weight must be reduced by 10%.
The towed weight is made up of the actual weights of the loaded towing vehicleand the loaded trailer.
The trailer and drawbar load information on the type plate of the towing device is
merely a test value for the towing device. The vehicle-specific values are detailed in the vehicle documents.WARNING■ Do not exceed the maximum permissible axle and drawbar load and the
maximum permissible total or towed weight of the vehicle and the trailer –
risk of accident and serious injury.■
Slipping loads can significantly impair the stability and safety of the vehicle/
trailer combination – risk of accident and serious injury.
Driving with a trailer
Fig. 142
Swivel out the 13-pin power
socket
First read and observe the introductory information and safety warn- ings on page 165.
Before the journey
›
Grip the 13-pin socket at point
A
and swing out in the direction of ar-
row » Fig. 142 .
›
Lift off protective cap
5
» Fig. 137 on page 162.
After the journey
›
Grip the 13-pin socket at point
A
and swing in the opposite direction to the ar-
row » Fig. 142 .
›Place the protective cover 5
» Fig. 137 on page 162 onto the tow bar.
Safety eyelet
The purpose of the safety eyelet B
» Fig. 142 is to attach the breakaway cable of
the trailer.
When attaching the breakaway cable to the safety eyelet, it must sag freely
against the vehicle in all trailer positions (sharp bends, in reverse etc.).
Exterior mirrors
You have to have additional exterior mirrors fitted if you are not able to see the
traffic behind the trailer with the standard rear-view mirrors. The national legal requirements must be observed.
Headlights
The front of the vehicle may lift up when a trailer is being towed and the head-
lights may dazzle other road users.
Adjust the headlights using the headlight beam control » page 51, Parking and
low beam lights .
Driving speed
For safety reasons, do not drive faster than 80 km/h when towing a trailer.
Immediately reduce your speed as soon as even the slightest swaying of the trail- er is detected. Never attempt to stop the trailer from “swaying” by accelerating.
Brakes
Apply the brakes in good time! If the trailer is fitted with a trailer brake, apply the
brakes gently at first, then brake firmly. This will avoid brake jolts resulting from
the trailer wheels locking.
On downhill sections shift down a gear in good time to also use the engine as a
brake.
Engine overheating
If the needle for the coolant temperature gauge moves into the right-hand area or the red area of the scale, the speed must be reduced immediately.
Stop and switch off the engine if the indicator light
in the instrument cluster
lights up. Wait a few minutes and check the level of coolant » page 213, Check-
ing the coolant level .
The following guidelines must be observed » page 16,
Coolant .
The coolant temperature can be reduced by switching on the heating.
166Driving
In certain accident situations, the several airbags may be deployed simultaneous-
ly.
The airbags are not deployed in the case of minor frontal and side collisions, rear-
end collisions, tilting of the vehicle and vehicle rollover.
Deployment factors
It is not possible to generally determine which deployment conditions apply to the airbag system in every situation. An important role is played by factors such as the type of object that the vehicle hits (hard/soft), the impact angle, vehicle
speed etc.
A decisive factor for the deployment of the airbags is the deceleration which oc- curs. The control unit analyses the nature of the collision and activates the rele-
vant restraint system.
If the vehicle deceleration which occurs and is measured during the collision re-
mains below the prescribed reference values specified in the control unit, the air-
bags are not deployed although the vehicle may well suffer severe damage to thebodywork as a consequence of the accident.
The following airbags will be deployed in the event of a severe frontal collision.
› Driver’s front airbag.
› Front passenger airbag.
› Driver’s knee airbag.
The following airbags will be deployed in the event of a severe side collision.
› Front side airbag on the side of the accident.
› Rear side airbag on the side of the accident.
› Head airbags on the side of the accident.
In the event of an accident in which the airbags are deployed:
› the interior lighting comes on (if the switch for the interior light is in the door
contact position),
› the hazard warning light is switched on;
› all the doors are unlocked;
› the fuel supply to the engine is interrupted.
Airbag overview
Introduction
This chapter contains information on the following subjects:
Front airbags
180
Driver’s knee airbag
181
Side airbags
181
Head airbags
182
179Airbag system