Problems with the engine startFig. 112
Starting the engine - Press the
button with the key
Read and observe and on page 97 first.
The key in the vehicle cannot be verified
If the key in the vehicle cannot be verified, then engine cannot be started by pressing a button.
One of the following messages are shown in the information cluster display.
Key not detected. Owner's manual!Key not found.NO KEY
The reasons for this may be.
▶ The battery in the key is almost out of charge.
▶ The key is malfunctioning.
▶ There is interference in the signal between the system and the key (strong
electromagnetic field).
Try to start the engine by pressing the knob with the key » Fig. 112.
System fault
If the following message appears on the display of the instrument cluster,
there is a system malfunction.
Keyless access system faulty.KEYLESS ACCESS SYSTEM FAULTY
Try to start the engine by pressing the knob with the key » Fig. 112.
CAUTION
The key can only be verified if it is in the vehicle. It is therefore not always nec-
essary to know where the key is.Note■ When attempting to start, the key bit must be pointed towards the button
» Fig. 112 .■
If engine fails to start after pressing the button with the key, seek specialist
help.
START-STOPsystem
Introduction
This chapter contains information on the following subjects:
Operation
100
Manually deactivating/activating the system
101
Information messages
101
The START STOPsystem (hereinafter referred to as the system) reduces
CO 2emissions and harmful emissions, and saves fuel.
If the system determine that the engine is not needed when the vehicle stops
(e.g. at the traffic lights), it turns off the engine and starts it again when mov-
ing off.
The system function depends on many factors. Some of them are down to the
driver, while others are systemic and can neither be influenced nor identified.
For this reason, the system may react differently in situations which seem
identical from the driver's perspective.
The system is automatically activated every time the ignition is switched on
(even when it has previously been manually deactivated with the button).
Note
If the engine has stopped due to the system, the ignition remains switched on.99Starting-off and Driving
OperationFig. 113
Display
Vehicles with manual transmission
The engine is automatically switched off as soon as the vehicle comes to a
halt, the shift lever is moved into neutral and the clutch pedal is released.
The engine is automatically started as soon as the clutch pedal is depressed.
Vehicles with automatic transmission
The engine is automatically switched off as soon as the vehicle comes to a
halt and the brake pedal is operated.
The engine is automatically started as soon as the brake pedal is released.
Requirements for the system to function correctly
The following conditions must be met for the system to function correctly.
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.
System status
The system status is shown in the display when the vehicle comes to a halt
» Fig. 113 .
The engine is switched off automatically; when moving off, the ignition
process will be initiated automatically.
The engine is not switched off automatically.
Reasons for the engine running
It may be essential for the engine to keep running when the vehicle comes to
a halt, for the following reasons. ▶ The engine temperature for the proper function of the system has not yet
been reached.
▶ The charge state of the vehicle battery is too low.
▶ The current consumption is too high.
▶ High air-conditioning or heating capacity (high fan speed, big difference be-
tween the desired and actual interior temperature).
When the engine is shut-down automatically and the system detects that the
engine is required such as when the brake pedal is pressed repeatedly then
the system automatically starts the engine.
Infotainment display
Information about the current status of the system can be displayed in the In-
fotainment display » Owner´s Manual Infotainment , chapter CAR - Vehicle set-
tings (CAR button) .
Note
■
If the vehicle remains outdoors for a long time in minus temperatures or in
direct sunlight, it can take several hours until the internal temperature of the
vehicle battery reaches a suitable temperature for proper operation of the
START STOP system.■
If the driver's seat belt is removed for more than approx. 30 seconds or the
driver's door is opened during stop mode, the engine will have to be started
manually.
■
No automatic engine shut-down takes place when a vehicle with automatic
transmission is moving at low speed (e.g. during a traffic jam) and remains sta-
tionary after pressing the brake pedal lightly. Automatic engine shut-down
takes place if you press the brake pedal down with more force.
■
For vehicles with automatic transmission there is no automatic engine shut-
down when the system detects a manoeuvring action due to a large steering
angle.
100Driving
Manually deactivating/activating the systemFig. 114
Button for the START-STOP sys-
tem
Deactivating/activating
›
Press the symbol » Fig. 114
button.
When system is deactivated, the warning light in the button illuminates.
If the system is deactivated, it will be reactivated automatically after the igni-
tion has been switched off and on.
Note
If the system is deactivated when the engine is turned off automatically, then
the automatic start process takes place.
Information messages
The warning symbols are shown in the instrument cluster display.
Start the engine manually!START MANUALLY
If for example the driver's seat belt is stored, the engine must be started man-
ually.
On vehicles with the starter button the ignition is turned off by the first press
of the start button, only after pressing for the second time is the start process
initiated.
Error: start-stop systemSTART STOP ERROR
A system error is present. Seek help from a specialist garage.
Brakes and parking
Introduction
This chapter contains information on the following subjects:
Information on braking
101
Handbrake
102
Parking
103WARNING■ Greater physical effort is required for braking when the engine is switch-
ed off – risk of accident!■
The clutch pedal must be actuated when braking on a vehicle with man-
ual transmission, when the vehicle is in gear and at low revs. Otherwise,
the functionality of the brake system may be impaired – risk of accident!
■
When leaving the vehicle never leave persons leave unattended in the
vehicle who could release the brake. The vehicle could then start to move –
risk of accident!
■
Observe the recommendations on the new brake pads » page 106, New
brake pads .
CAUTION
Never let the brakes slip with light pressure on the pedal if braking is not nec-
essary. This causes the brakes to overheat and can also result in a longer brak-
ing distance and excessive wear.
Information on braking
Read and observe
and on page 101 first.
Wear-and-tear
The wear of the brake pads is dependent on the operating conditions and driv-
ing style.
The brake pads wear more quickly if a lot of journeys are completed in towns
and over short distances or if a very sporty style of driving is adopted.
Under these severe conditions , the thickness of the brake pads must also be
checked by a specialist garage between service intervals.
101Starting-off and Driving
D/S - mode for driving forward (Normal program) / mode for driving
forward (Sport program)
The system switches from one mode to the other by moving the selector lever
into the spring-loaded position
» Fig. 117 .
In mode D or S, the forward gears are shifted automatically depending on the
engine load, the operation of the accelerator pedal, the vehicle speed, and the
selected driving mode .
In mode S, the forward gears are shifted automatically up and down at higher
engine speeds than in mode D.
Selector lever lock
Fig. 118
Shift lock button
Read and observe and on page 104 first.
The selector lever is locked in modes P and N to prevent the forwards travel
mode from being selected accidentally and setting the vehicle in motion.
The selector lever is only locked when the vehicle is stationary and at speeds
up to 5 km/h.
The selector lever lock is indicated by the illumination of the warning light .
The selector lever is not locked when quickly moving across the position N
(e.g. from R to D/S ). This, for example, helps to rock out a vehicle that is stuck,
e.g. in a bank of snow. The selector lever lock will engage if the lever is in posi-
tion N for more than approx. 2 seconds without the brake pedal being de-
pressed.
Releasing selector lever from mode P or N (selector lever lock)
›
Press the brake pedal and the lock button at the same time in the direction
of
1
» Fig. 118 .
Just depress the brake pedal, if you would like to change from the mode N to
D/S .
Defective selector lever lock
If the selector lever lock is defective or its power supply is interrupted (e.g. dis-
charged vehicle battery, faulty fuse), the selector lever can no longer be moved
out of position P in the normal manner and the vehicle can no longer be driven.
The selector lever must be emergency released » page 172.
Note
If you want to move the selector lever from mode P to mode D/S or vice versa,
move the selector lever quickly. This prevents modes R or N from being acci-
dentally selected.
Manual shifting (Tiptronic)
Fig. 119
Selector lever
Read and observe and on page 104 first.
Tiptronic mode makes it possible to manually shift gears on the selector lever. This mode can be selected both while stopping and while driving.
The currently selected gear is indicated in the » Fig. 117 on page 104 display.
The gear shift indicator must be observed when changing gear » page 39.
Switching to manual shifting
›
Push the gear selector from position D/S towards the right, or left in a right-
hand drive vehicle.
When switching to the manual shifting while driving, the current gear is main-
tained.
Shifting up gears
›
Push the selector lever
+
» Fig. 119 forwards.
Shifting down gears
›
Push the selector lever
-
» Fig. 119 backwards.
105Starting-off and Driving
Note■It may be beneficial, for example, when travelling downhill, to use manual
shifting of gears. Shifting to a lower gear reduces the load on the brakes and
hence the wear on the brakes » page 101.■
When accelerating, the gearbox automatically shifts up into the higher gear
just before the maximum permissible engine speed is reached.
■
If a lower gear is selected, the gearbox does not shift down until there is no
risk of the engine over-revving.
Starting-off and driving
Read and observe
and on page 104 first.
Starting off
›
Start the engine.
›
Firmly depress and hold the brake pedal.
›
Press the lock button in the direction of
1
» Fig. 118 on page 105 and hold.
›
Move the selector lever into the desired position » page 104 and then release
the lock button.
›
Release the brake pedal and accelerate.
Stopping (while the car is moving)
›
Depress the brake pedal and bring the vehicle to a stop.
›
Keep holding the brake pedal until driving is resumed.
The selector lever position N does not have to be selected when stopping for a
short time, such as at a cross roads.
Kick-down
The kick-down function allows you to achieve the maximum acceleration of
your vehicle while driving.
When the accelerator pedal is fully depressed, the kick-down function is acti-
vated in any forward driving mode.
The gearbox shifts down one or more gears depending on the vehicle speed
and engine speed, and the vehicle accelerates.
The gearbox does not shift up into the highest gear until the engine has
reached its maximum revolutions for this gear range.
WARNINGRapid acceleration, particularly on slippery roads, can lead to loss of vehicle
control – risk of accident!Running-in and economical driving
Introduction
This chapter contains information on the following subjects:
Running-in
106
Tips for economical driving
106
DriveGreen function
107
The fuel consumption, degree of pollution and vehicle wear depend on driving
style, road condition, weather conditions and the like.
Running-in
Driving in the engine
The engine has to be run in during the first 1,500 kilometres. During this peri-
od, the driving style decides on the quality of the driving-in process.
During the first 1,000 km , we recommend not driving faster than 3/4 of the
maximum permissible engine speed, not to drive at full throttle and not to use
a trailer.
In the range of 1,000 to 1,500 kilometres, the engine load can be increased up
to the maximum permitted engine speed.
New tyres
New tyres must firstly be “run in”, as they do not offer optimal grip at first.
Therefore, drive with special care for the first 500 km or so.
New brake pads
New brake pads have to first “grind in” because these do not initially have the
best possible braking effect.
Therefore, drive with special care for the first 200 km or so.
Tips for economical driving
To achieve the lowest possible fuel consumption, the following instructions
must be observed.
Looking ahead when driving
Avoid unnecessary acceleration and braking.
Change gear in an energy saving and timely manner
Observe the recommended gear » page 39.
106Driving
Avoid full throttle and high speeds
Fuel consumption can be reduced by half if only three-quarters of the possible
top speed of your vehicle is used.
Reducing idling
If the vehicle is fitted with the START - STOP system there is an automatic re-
duction of the idling. If the engine is stopped on vehicles without START-STOP
system, such as when waiting in a traffic jam, the fuel economy is already
greater after 30 - 40 s than the fuel quantity which is required for engine re-
start.
Avoid short distances
When driving a short distance of less than about 4 km, the engine cannot
reach its operating temperature. As long as the engine has not reached oper-
ating temperature, the fuel consumption is significantly higher than with the
engine hot.
Pay attention to the correct tyre inflation pressure being maintained
Further information » page 155.
Avoid unnecessary ballast
Per 100 kg of weight, consumption increases by about 0.3 l/100 km. At a speed
of 100 - 120 km/h, a vehicle fitted with a roof rack cross member without a load
will use about 10 % more fuel than normal due to the increased aerodynamic
drag.
Saving electricity
Only turn on electrical consumers (e.g. seat, window and mirror heating and
the like) for as long as necessary.
Use the cooling system economically
The air conditioning system compressor uses power from the engine when in
cooling mode, which will affect the fuel consumption.
It recommended to open the windows or the doors of a vehicle for which the
interior has been strongly heated through the effect of direct sunlight in order
to allow the heated air to escape.
The cooling system should not be on if the windows are open.DriveGreen functionFig. 120
Shown in the infotainment dis-
play
The DriveGreen function (hereinafter referred to as DriveGreen) evaluates the
driving efficiency based on the information with regard to driving style. Useful
tips for reducing fuel consumption are also offered.
DriveGreen can be displayed on the Infotainment as follows.
›
Press the button in the Infotainment and then in the display the function
keys one after the other ,
DriveGreen
.
A
driving liquid display
With the driving is liquid the display is near the green dot. When accelerating
or braking, the indicator moves down or up.
B
“Green leaf”
The leaf margin shown in green shows with a few seconds, the current drive
efficiency. When driving economically there are several green layers on the
edge of the leaf. When driving less economically, no green colour appears and
the leaf can disappear completely.
C
Graphical review summary
The evaluation of the driving economy during the last 3 minutes or 1.5 minutes
(depending on type of Infotainment) is shown like a beam in 5-second incre-
ments. The current status is shown on the left and moves gradually to the
right. The higher the green bars, the more economic the driving style is.
D
Scoring
In the function key, the evaluation of driving efficiency is shown from the start
in the range from 0 to 100 points. The higher the indicated value, the more
economic the driving style is.
When you press the function key, a detailed assessment showing the driving
efficiency during the last 30 minutes is shown.
107Starting-off and Driving
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. 134
Buttons/dial: on the control lever/on the multifunction steering
wheel
Read and observe
and on page 116 first.
The system 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. 134ActionOperationAPress 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. 134ActionOperation
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 .
f the distance-warning function was deactivated before the ignition was
switched off, it remains deactivated after the ignition is switched on again.
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.
Information messages
Read and observe
and on page 116 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.
118Driving
Stop the car, switch off the engine and clean the sensor or eliminate the dis-
turbance causing the lack of visibility » Fig. 131 on page 116 .
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
119
Information messages
119
The fatigue detection system (hereinafter referred to as the 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 109, in section Introduction .■
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 119 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 119 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
120
Save tyre pressure values and infotainment display
120
Save tyre pressure values by pressing a button
121
119Assist systems