WARNINGThe general information relating to the use of assistance systems must be
observed » page 114, in section Introduction .
Operation
Fig. 141
Maxi DOT display: Examples of Speed Limiter status displays
Fig. 142
Segment display: Examples of Speed Limiter status displays
Read and observe
on page 121 first.
Status display of the Speed Limiter » Fig. 141, » Fig. 142
Speed limit set, but regulation is inactive.
Control is active.
No speed limit set.
System fault - seek assistance from a specialist garage immediately.
Basic requirements for starting the control The Speed Limiter is activated.
The current speed is higher than approx. 30 km/h.
Operation description
Fig. 143
Operating elements of the speed limiter: Vehicle with Speed Lim-
iter / vehicle with GRA and Speed Limiter
Read and observe
on page 121 first.
Overview of the control elements of the Speed Limiter » Fig. 143ASpeed Limiter disable (set limit delete) Interrupt control (sprung position) Activate Speed Limiter (regulation deactivated) For vehicles with GRA and Speed Limiter, the GRA is activated by
the switch in the
position by being adjusted. The activation of
the Speed Limiter occurs only after pressing the button
.BTake control again a)
/ Increase speed - short press (in increments
of 1 km/h), long press (in increments of 10 km/h)CStart regulation / reduce speed - short press (in increments of 1
km/h), long press (in increments of 10 km/h)DSwitch between GRA » page 119 and Speed Limitera)
If no speed limit is set, the current speed is set as the speed limit.
At the start of the regulation, the current speed is set as the speed limit and
displayed in the instrument cluster display. The warning light illuminates in
the instrument cluster.
121Assist systems
Exceeding the speed limit during the regulation
If exceeding the speed limit is required during the regulation, for example
when overtaking, then the accelerator pedal is to be fully pressed.
When exceeding the speed limit, an acoustic signal sounds and the warning
light
in the instrument cluster flashes.
The regulation is resumed once the speed has fallen below the set limit.
CAUTION
When driving downhill, exceeding the set speed limit may occur. When exceed-
ing the limit, an acoustic signal sounds and the warning light in the instru-
ment cluster flashes.
Note
By pressing the button during the regulation this is cancelled and the GRA
is activated.
Front Assist
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
125
The Front Assist (hereinafter referred to as "system") warns you of the danger
of a collision with a vehicle or another obstacle in front of the vehicle, and tries
to avoid a collision or mitigate its consequences by automatically applying the
brakes where necessary.
The area in front of the vehicle is monitored by a radar sensor » Fig. 144 on
page 122 .
WARNING■
The general information relating to the use of assistance systems must
be observed » page 114, in section Introduction .■
The system does not respond to crossing or oncoming objects.
CAUTIONIn case of failure of more than one brake light on the vehicle or on the electri-
cally connected trailer, the system becomes unavailable.
Radar sensor
Fig. 144
Mounting location of the radar
sensor
Read and observe and on page 122 first.
The radar sensor » Fig. 144(hereinafter referred to as "sensor") may detect ob-
jects 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 125, 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!
122Driving
CAUTIONRemove the snow with a brush and the ice with a solvent-free de-icer.
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 115.
Distance warning (dangerous distance)
Fig. 145
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. 145 .
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. 146
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. 146
in the display.
Advance warning
If the system detects a risk of collision, the symbol » Fig. 146
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!
123Assist systems
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.
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. 147
Buttons/dial: on the operating lever/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. 14 7ActionOperation
APress and hold at the top or downShow Front Assist menu itemBPress brieflyConfirm entry (disable / enable)
Deactivation / activation in vehicles with multi-function steering wheel
Button /dial
» Fig. 14 7
ActionOperation
CPress brieflyShow Front Assist menu itemDPress 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 » Owner´s Manual Infotainment , chap-
ter CAR - Vehicle Settings .
If the distance-warning function was deactivated before switching off the igni-
tion, it remains deactivated after switching on the ignition.
WARNINGIn the following situations, Front Assist should be switched off for safety
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.
124Driving
Information messagesRead 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
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. 144 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 as "system") recom-
mends the driver takes a break from driving when driver fatigue can be detec-
ted due to the driver's steering behaviour.
WARNING■ The general information relating to the use of assistance systems must
be observed » page 114, in section Introduction .■
For the driving ability is always the driver's responsibility. Never drive if
you feel tired.
WARNING (Continued)■ 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 » Owner´s
Manual 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
125Assist systems
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
The tyre pressure monitoring function (hereinafter known as "system") moni-
tors 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 general information relating to the use of assistance systems must
be observed » page 114, in section Introduction .■
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 display
Fig. 148
Button for storing the pressure
values/example of the display:
the system suggests a change to
the front-left tyre pressure
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. 148 .
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. 148.126Driving
The oil level must be checked at regular intervals.
In case of low oil level, a control light
is displayed on the instrument cluster,
as well as the corresponding message » 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. 168 - risk of damage to
the motor as well as the exhaust system.■
Do not continue driving! If for some reason, it is not possible to top up the
engine oil under the current circumstances!
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. 166 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 share 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. 169 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. 169 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
■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. 169
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. 169
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. 169.
If the engine is warm, the test result may be inaccurate. The stand can also be
above the mark
A
» Fig. 169 .
In the event of an insufficient coolant level, a control light is displayed on
the instrument cluster, as well as the corresponding message » page 36,
Coolant . We still recommend inspecting the coolant level directly at the reser-
voir 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.
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.
Only top up with new coolant.
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. 170 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