Downloaded from www.Manualslib.com manuals search engine Front Assistant
Introduction
This chapter contains information on the following subjects:
Radar sensor
122
Operation
123
Distance warning (dangerous distance)
123
Warning and automatic braking
123
Disable / enable
124
Information messages
124
The Front Assistant (from here on only referred to as the system) warns you of
the danger of a collision with a vehicle or another obstacle in front of the vehi-
cle and tries to avoid a collision or mitigate its consequences by automatically
applying the brakes as appropriate.
The area in front of the vehicle is monitored by a radar sensor » Fig. 135 on
page 122 .
WARNING■
The system only serves as an assistance and does not relieve the driver
of the responsibility for the vehicle operation.■
The system has physical and system-related limitations. For this reason,
the driver may experience some undesired or delayed system responses in
certain situations. You should therefore always be alert and ready to inter-
vene!
■
Always adapt your speed and safety proximity to the vehicle ahead to the
current visibility, weather, road and traffic conditions.
■
The increased passenger protection afforded through the system must
not tempt you to take greater risks than otherwise – risk of accident!
■
The system does not respond to crossing or oncoming objects.
CAUTION
In case of failure of more than one brake light on the vehicle or on the electri-
cally connected trailer, the system becomes unavailable.Radar sensorFig. 135
Mounting location of the radar
sensor
Read and observe and on page 122 first.
The radar sensor » Fig. 135(Hereinafter referred to simply as the sensor) may
detect objects by radiating and receiving electromagnetic waves.
The sensor function may be impaired in the events of one of the following.
› The sensor is soiled by mud, snow and the like.
› The area in front and around the sensor is obscured by labels, auxiliary lights
and similar.
› When visibility is poor, (e.g. fog, heavy rain, thick snowfall).
If the sensor is dirty or covered, the corresponding message appears on the
display of the instrument cluster » page 124, Information messages .
WARNING■
If you suspect that the sensor is damaged, deactivate the system. Have
the sensor checked by a specialist garage.■
The sensor can become misaligned by collisions or by damage to the front
of the vehicle, the wheel arch or the underside of the vehicle. This can lead
to impaired function of the sensor - risk of accidents! Have the sensor
checked by a specialist garage.
■
The area in front and around the senor should not be obscured by labels,
auxiliary lights and similar. This can lead to impaired function of the sensor
- risk of accidents!
CAUTION
Remove the snow with a brush and the ice with a solvent-free de-icer.122Driving
Downloaded from www.Manualslib.com manuals search engine OperationRead and observe
and on page 122 first.
The system support is provided in the following manner.› Alerts you about a dangerous proximity to the vehicle ahead.
› Warns you of an impending collision.
› Prepares the brakes for emergency braking prior to a detected danger.
› Assists with a brake action triggered by the driver.
› If the driver fails to respond to a detected danger, an automatic braking ac-
tion is performed.
The system can work only if the following basic conditions are met. The system is activated.
The TCS is activated » page 115, Traction control (TCS) .
The vehicle is moving forwards at a speed of more than approx. 5 km/h.
Note
The system can be impaired or may not be available, for example when driving
in “sharp ”curves or with an ESC engagement » page 114.
Distance warning (dangerous distance)
Fig. 136
Symbols in the instrument cluster: Note (dangerous
proximity)
Read and observe and on page 122 first.
The display of the distance warning is for vehicles with MAXI DOT display.
If a safe interval to the vehicle ahead falls below a minimum the display of the
instrument cluster shows the symbol
» Fig. 136 .
Immediately increase the proximity if the current traffic situation allows you to do so!
The proximity at which the warning is displayed depends on the current speed.
The warning may occur when driving between about 60 km/h and 210 km/h.
Warning and automatic braking
Fig. 137
Symbols in the instrument cluster: Warning or emer-
gency braking at low speed
Read and observe and on page 122 first.
Emergency braking at low speed
In a driving speed range of about 5 km/h to about 30 km/h the automatic brak-
ing action is not preceded by a warning. With an immediate impact hazard au-
tomatic braking is done with the breaking force increasing in stages.
With automatic braking the symbol appears » Fig. 137
in the display.
Advance warning
If the system detects a risk of collision, the symbol » Fig. 137
appears in the
display and you will hear an acoustic signal.
At the same time, the braking system is prepared for possible emergency brak- ing.
The pre-warning display can occur in the following situations. › If there is a risk of collision with a moving obstacle in a driving speed range of
about 30 km/h to about 210 km/h.
› There is a risk of a collision with a stationary moving obstacle in a vehicle
speed range of approximately 30 km/h to about 85 km/h.
With a warning the brake pedal must be pressed or the moving obstacle is to
be avoided!
Acute alert
If the driver does not react to the advance warning, the system briefly applies
the brake automatically via an active brake intervention to draw attention to
the potential danger of a collision again.
123Assist systems
Downloaded from www.Manualslib.com manuals search engine Automatic Braking
If the driver fails to respond to the acute warning, the system starts to apply
the brakes automatically with increasing stopping power in several stages.
Brake assist
If the driver brakes inadequate with an impending collision, the system auto-
matically increases braking force.
The braking assistance only occurs as long as the brake pedal is being firmly
pressed down.
Note
■ If an automatic brake intervention is triggered by the system, the pressure in
the brake system increases and the brake pedal cannot be operated with the
normal pedal stroke.■
The automatic braking interventions can be cancelled by pressing the accel-
erator pedal or by steering intervention.
Disable / enable
Fig. 138
Buttons / wheel: on the operating lever / on the multifunction
steering wheel
Read and observe
and on page 122 first.
The function is automatically activated each time the ignition is switched on.
The system should only be disabled in exceptional cases »
.
On vehicles with the MAXI DOT display, the system can be activated / deactiva-
ted in the main menu in menu item Assist systems » page 42 .
Deactivation / activation in vehicles with segment displayButton
» Fig. 13 8ActionOperation
APress and hold at the top or downShow menu item Front AssistBPress brieflyConfirm entry (disable / enable)
Deactivation / activation in vehicles with multi-function steering wheel
Button /dial
» Fig. 13 8
ActionOperation
CPress brieflyShow menu item Front AssistDPress brieflyConfirm entry (disable / enable)
Disable / enable and setting in the Infotainment
In the Infotainment the entire system or the functions warning and distance warning can be disabled / enabled » Operating instructions Infotainment ,
chapter CAR - Vehicle Settings .
After switching off and switching on the ignition system several times the
functions warning and distance warning remain either activated or deactivated
depending on the last setting.
WARNINGIn the following situations, Front Assistant should be switched off for safe-
ty reasons.■
When the vehicle is being towed away.
■
When the vehicle is on a rolling test bench.
■
If an unfounded warning or a system action was taken.
■
When on a truck, or a car ferry service or similar.
Information messages
Read and observe
and on page 122 first.
The warning symbols are shown in the instrument cluster display. Front Assist: no sensor view.
FRONT ASSIST NO SENSOR VIEW
124Driving
Downloaded from www.Manualslib.com manuals search engine The sensor is soiled or covered.
Stop the car, switch off the engine and clean the sensor or eliminate the dis-
turbance causing the lack of visibility » Fig. 135 on page 122 .
If after engine start the message persists, then the help of a professional or-
ganisation is required.
Front Assist not available.
FRONT ASSIST NOT AVAILABLE
The system is not available for an unknown reason.
Stop the vehicle, switch off the engine and then start it again.
If after engine start the message persists, then the help of a professional or- ganisation is required.
Fatigue detection
Introduction
This chapter contains information on the following subjects:
Function
125
Information messages
125
The fatigue detection system (hereinafter referred to only as system) recom-
mends the driver taking a break from driving when, because of the driver's
steering behaviour, driver fatigue can be detected.
WARNING■ 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 condi-
tions or poor road conditions).■
The system is designed primarily for use on motorways.
Function
Read and observe
on page 125 first.
From the start of the journey, the system evaluates steering behaviour. If,
while driving, there have been changes in the steering behaviours that are
evaluated by the system as indicating possible fatigue, a break recommenda-
tion is issued.
The system evaluates steering behaviour and recommends a break at speeds
of 65 - 200 km/h.
The system detects a break from driving when 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
system recommends a driving break again after 15 minutes.
The system can be activated or deactivated in the Infotainment » Operating
instructions Infotainment , chapter CAR - vehicle settings .
Information messages
Read and observe
on page 125 first.
The icon appears and the following message for a few seconds in the display
of the instrument cluster and the following message.
Driver alert. Take a break!
DRIVER ALERT TAKE A BREAK
An audible signal is also emitted.
Tyre pressure monitoring
Introduction
This chapter contains information on the following subjects:
Save tyre pressure values
126
Save tyre pressure values and infotainment display
126
Save tyre pressure values by pressing a button
127
125Assist systems
Downloaded from www.Manualslib.com manuals search engine The tyre pressure monitoring function monitors (hereinafter referred to only as
a system) the tyre pressure while driving.
When changing the tyre inflation pressure, the warning light illuminates
in
the instrument cluster and an audible signal is heard.
Information on the procedure for the indication of change in tyre pressure val- ues » page 34 .
The system can only function properly if the tyres have the prescribed tyre
pressure and this pressure values are stored in the system.WARNING■ The correct tyre pressure values is always the driver's responsibility. The
tyre pressure should be checked regularly » page 161.■
The system cannot warn in case of very rapid loss of tyre pressure, e.g. in
the event of a sudden puncture.
Save tyre pressure values
Read and observe
on page 126 first.
The tyre pressure valuesare always stored in the system, if one of the follow-ing events is present.
› Change of tyre pressure values.
› Change one or more wheels.
› Change in position of a wheel on the vehicle.
› The warning light
in the instrument cluster.
The storage of the tyre pressure values depends on equipment, either in the
infotainment or by pressing a button.
WARNINGBefore storing the tyre pressures they must be inflated to the specified in-
flation pressure » page 161. If incorrect pressure values are storedthe sys-
tem may not warn even with a tyre pressure that is too low.
CAUTION
The tyre pressure values should be stored every 10 000 km or once a year to
ensure proper system function.Save tyre pressure values and infotainment displayFig. 139
Button for storing the pressure
values / Example of the display:
the system indicates a tyre pres-
sure change front left
Read and observe on page 126 first.
›
Inflate all of the tyres to the specified inflation pressure.
›
Switch on the ignition.
›
The Infotainment switches on.
›
Press the button in the Infotainment and then in the display the function
keys one after the other ,
Vehicle status .
›
By using the function keys
select the menu item
Tyre Pressure Loss Indi-
cator .
›
Press the button
SET » Fig. 139 .
In addition, follow the instructions that appear on the display.
A message in the display informs about the storage of the tyre pressure val-
ues.
Note
When a warning light in the instrument cluster appears, the affected tyre
can be displayed on the infotainment » Fig. 139.126Driving
Downloaded from www.Manualslib.com manuals search engine The distribution of the weight is very poor if your vehicle is unladen and the
trailer is laden. Maintain a particularly low speed if you cannot avoid driving
with this combination.
Tyre pressure
Correct the tyre inflation pressure on your vehicle for a “full load” » page 161.
Towing capacity and trailer weight
The permissible trailer load must not be exceeded under any circumstances
» page 192 , Technical data .
The details given in the vehicle's technical documentation always take prece-
dence over the details in the Owner's Manual.
The trailer loads specified apply only to altitudes up to 1,000 metres above
mean sea level.
The engine output falls as altitude increases, as does the ability to climb.
Therefore, for every additional 1,000 m in height (or part), the maximum per-
missible towed weight must be reduced by 10 %.
The towed weight comprises the actual weights of the (loaded) towing vehicle and the (loaded) trailer.
The trailer and drawbar load information on the type plate of the towing
equipment are merely test data for the towing equipment. The vehicle-specific
values are detailed in the vehicle documents.WARNING■ Do not exceed the maximum permissible axle and drawbar load and
weight of the trailer - risk of accident and serious injuries!■
An unsecured load can adversely affect stability and driving safety signifi-
cantly - there is a risk of accident!
Towing a trailer
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
trailer is detected. Never attempt to stop the trailer from “swaying” by acceler-
ating.
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 pointer of the coolant temperature gauge reaches the red scale range,
the speed should be reduced immediately.
Stop and switch off the engine if the warning light
illuminates in the instru-
ment cluster display.
The following information must be observed » page 36,
Coolant
.
The coolant temperature can be reduced by switching on the heating.WARNING■ Always drive particularly carefully with the trailer.■Adapt your speed to the conditions of the road surface and to the traffic
situation.
CAUTION
If you tow a trailer frequently, you should also have your vehicle inspected be-
tween service intervals.
Anti-theft alarm system
When the vehicle is locked, the alarm is activated when the electrical connec-
tion to the trailer is interrupted.
Always switch off the anti-theft alarm system before a trailer is coupled or un-
coupled » page 54 .
Conditions for including a trailer in the anti-theft alarm system. The vehicle is factory-fitted with an anti-theft alarm system and towing
equipment.
The trailer is electrically connected to the towing vehicle by means of the
trailer socket.
The electrical system of the vehicle and trailer is functional.
The vehicle is locked with the vehicle key and the anti-theft alarm system
is activated.
134Driving
Downloaded from www.Manualslib.com manuals search engine The oil level must be checked at regular intervals.
In case of low oil level, the display of the instrument cluster shows a check
mark
as well as the relevant notification » page 37. Check the oil level using
the dipstick as soon as possible. Add oil accordingly.
CAUTION
■ The oil level must never be above the range A » Fig. 159 - risk of damage to
the motor as well as the exhaust system.■
If for some reason, it is not possible to top up the engine oil under the cur-
rent circumstances,
do not continue driving! Switch off the engine and seek
assistance from a specialist garage.
■
If the oil level is above the range
A
,
do not continue to drive! Switch off
the engine and seek assistance from a specialist garage.
Replenishing
Read and observe
and on page 153 first.
›
Unscrew the cap of the engine oil filler opening » Fig. 157 on page 151 .
›
Replenish the oil in portions of 0.5 litres in accordance with the correct speci-
fications » page 153 .
›
Check the oil level » page 153.
›
Screw the lid of the engine oil filler closed carefully.
›
Pull the dipstick out as far as the stop.
Coolant
Introduction
This chapter contains information on the following subjects:
Checking the coolant level
155
Replenishing
155
The coolant provides cooling for the motor.
It consists of water and coolant additive with additives that protect the cooling
system against corrosion and prevents furring.
The coolant additive level in the coolant must be at least 40%.
The coolant additive may be increased to a maximum of 60%.
The correct mixing ratio of water and coolant additive is to be checked if nec- essary by a specialist garage or is to be restored if necessary.
The description of the coolant is shown in the coolant expansion reservoir » Fig. 160 on page 155 .WARNINGThe engine compartment of your car is a hazardous area. While working in
the engine compartment, be sure to observe the following warnings
» page 149 .■
The coolant is harmful to health.
■
Avoid contact with the coolant.
■
Coolant vapours are harmful to health.
■
Never open the end cover of the coolant expansion reservoir while the
engine is still warm. The cooling system is pressurized!
■
When opening the end cover of the coolant expansion reservoir, cover it
with a cloth to protect your face, hands and arms from hot steam or hot
coolant.
■
If any coolant splashes into your eyes, immediately rinse out your eyes
with clear water and contact a doctor as soon as possible.
■
Always keep the coolant in the original container safe from people who
are not completely independent, especially children - there is a danger of
poisoning!
■
Consult a doctor immediately if coolant is swallowed.
■
Never spill operating fluids over the hot engine - risk of fire.
CAUTION
■ Do not continue if for some reason it is not possible to fill with coolant un-
der the current circumstances! Switch off the engine and seek assistance from
a specialist garage.■
With an empty expansion tank top up coolant. The system could ventilate -
there is a risk of engine damage,
not continue! Switch off the engine and
seek assistance from a specialist garage.
■
The amount of coolant additive in the coolant must never be allowed to fall
below 40 %.
■
Over 60 % coolant additive in the coolant reduces the antifreeze protection
and coolant effectiveness.
■
A coolant additive that does not comply with the correct specification can
significantly reduce the corrosion protection of the cooling system.
■
Any faults resulting from corrosion may cause a loss of coolant and can con-
sequently result in major engine damage.
■
Do not fill the coolant above the mark
A
» Fig. 160 on page 155 .
■
If an error occurs, leading to the engine overheating, the help of a professio-
nal garage is to be sought - there is a risk of serious engine damage occurring.
154General Maintenance
Downloaded from www.Manualslib.com manuals search engine ■Additional headlights and other attached components in front of the air inlet
impair the cooling efficiency of the coolant.■
Never cover the radiator - there is a risk of the engine overheating.
Checking the coolant level
Fig. 160
Coolant expansion reservoir
Read and observe and on page 154 first.
The coolant expansion bottle is located in the engine compartment.
Coolant expansion reservoir » Fig. 160
Mark for the maximum permissible coolant level
Mark for the lowest permissible coolant level
The coolant level should be kept between the marks
A
and
B.
The coolant can be checked and topped up, if the following conditions are sat-
isfied.
The vehicle is standing on a horizontal surface.
The engine is turned off.
The engine is not heated.
The bonnet is open.
Check the status
›
Check the level of coolant at the coolant expansion vessel » Fig. 160.
If the engine is warm, the test result may be inaccurate. The stand can also be
above the mark
A
» Fig. 160 .
In case of low coolant level, the control symbol is displayed in the instrument
cluster as well as the relevant notification
» page 36,
Coolant
in the in-
strument cluster. We still recommend inspecting the coolant level directly at
the reservoir from time to time.
ABLoss of coolant
A loss of coolant is first and foremost an indication of a leak in the cooling sys-
tem. Do not merely top up the coolant. Have the cooling system checked by a
specialist garage.
Replenishing
Read and observe
and on page 154 first.
The coolant expansion tank should always contain a small amount of coolant» page 154, in section Introduction .
›
Place a cloth over the cap of the coolant expansion tank and carefully un-
screw the cap.
›
Replenish the coolant.
›
Turn the cap until it clicks into place.
CAUTION
■ Only top up with new coolant.■Do not use an alternative additive if the specified coolant is not available. In
this case, use just water and have the correct mixing ratio of water and cool-
ant additive restored by a specialist garage as soon as possible.
Brake fluid
Introduction
This chapter contains information on the following subjects:
Level check
156
Specification
156
The brake fluid reservoir is located in the engine compartment » Fig. 161 on
page 156 .
WARNING■
The engine compartment of your car is a hazardous area. While working in
the engine compartment, be sure to observe the following warnings
» page 149 .■
Do not use used brake fluid - the function of the brake system may be im-
paired – there is the risk of an accident.
155Inspecting and replenishing