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
Checking the battery electrolyte levelFig. 158
Vehicle battery: Electrolyte level
indicator
Read and observe and on page 151 first.
On vehicles with a vehicle battery fitted with a colour indicator, the electrolyte
level can be determined by looking at the change in colour of this display.
Air bubbles can influence the colour of the indicator. For this reason carefully
knock on the indicator before carrying out the check.
Check
Black colour – electrolyte level is correct.
Colourless or light yellow colour – electrolyte level too low, the battery must
be replaced.
For technical reasons, on vehicles with the description “AGM”, the electrolyte
level cannot be checked.
Vehicles with the START STOPsystem are fitted with a battery control unit for
checking the energy level for recurring engine starts.
We recommend that you have the acid level checked regularly by a specialist
garage, especially in the following cases. ▶ High external temperatures.
▶ Longer day trips.
▶ After each charge.
Winter time
The vehicle battery only has a proportion of the starting power in lower tem-
peratures. A discharged vehicle battery may already freeze at temperatures
just below 0 °C .
We therefore recommend that you have the battery checked and, if necessary,
recharged by a specialist garage before the start of the winter.
NoteThe battery acid level is also checked regularly by a specialist garage as part of
the inspection service.
Charging
Read and observe
and on page 151 first.
A properly charged vehicle battery is essential for reliably starting the engine.
A charging operation can be performed if the following conditions are satis-
fied.
The engine is turned off.
The ignition is switched off.
All consumers are turned off.
The bonnet is open.
“Fast charging” with high currents
›
Disconnect both battery cables (first of all “negative”, then “positive”).
›
Attach the terminal clamps of the charger to the battery terminals (red =
“positive”, black = “negative”).
›
Plug the mains cable of the charger into the power socket and switch on the
device.
›
After charging has been successful: Switch off the charger and remove the
mains cable from the power socket.
›
Only then disconnect the charger's terminal clamps.
›
Reconnect the cables to the battery (first “positive”, then “negative”).
Charging with low voltages
It is not necessary to disconnect the cables from the battery if you recharge
the vehicle battery, for example from a mini-charger.
Refer to the instructions of the charger manufacturer .
A charging current of 0.1 multiple of the total vehicle battery capacity (or low-
er) must be used until full charging is achieved.
The vent plugs of the vehicle battery should not be opened for charging.
152General Maintenance
WARNING■When you charge a battery, hydrogen is released, and a highly explosive
gas mixture is also produced. An explosion can be caused through sparkling
over during unclamping or loosening of the cable plug while the ignition is
on.■
Creating a bridge between the poles on the battery (e.g. with metal ob-
jects - cables) creates a short circuit - risk of damage to the battery, explo-
sion and burning of the battery, jets of acid spurting out.
■
Avoid creating sparks when working with cables and electrical devices.
Strong sparking represents a risk of injury.
■
Before carrying out any work on the electrical system, switch off the en-
gine, the ignition and all electrical consumers and disconnect the negative
terminal
.
■
“Quick-charging” the vehicle battery is dangerous and requires a special
charger and specialist knowledge.
■
We therefore recommend that vehicle batteries be “rapidly charged” by a
specialist garage.
CAUTION
On vehicles with the START/STOP system, the pole terminal of the charger
must not be connected directly to the negative terminal of the vehicle battery,
but only to the engine earth » page 168, Jump-starting using the battery from
another vehicle .
Replacing
Read and observe
and on page 151 first.
The new vehicle battery must have the same capacity, voltage, current and
size as the original battery. Suitable vehicle battery types can be purchased
from a specialist garage.
We recommend you have the battery replaced by a specialist garage.
Disconnecting and reconnecting
Read and observe
and on page 151 first.
Disconnecting
›
Switch off the ignition.
›
First, disconnect the negative terminal
first, then the positive
terminal
of the battery.
Connecting›First, connect the positive first, then the negative battery terminal.
After disconnecting and re-connecting the vehicle battery, the following func-
tions or devices are partially or completely inoperative.Function / deviceCommissioningTime settings» page 31
CAUTION
■ Disconnect the vehicle battery only with the ignition turned off - there is a
risk of damaging the electrical system of the vehicle.■
Under no circumstances must the battery cables be connected incorrectly –
risk of a cable fire.
Note
■ After disconnecting and re-connecting the vehicle battery, we recommend
having the vehicle checked by a specialist to ensure that the full functionality
of all electrical systems is guaranteed.■
The data of the multi-function display will be reset.
Automatic load deactivation
Read and observe
and on page 151 first.
The vehicle's electrical system automatically prevents the battery from dis-
charging when the battery is being heavily used. This manifests itself by the
following. ▶ The idling speed is raised to allow the generator to deliver more electricity to
the electrical system.
▶ Where necessary, large convenience consumers such as seat heaters and
rear window heaters have their power limited or are shut off completely in
the event of an emergency.
CAUTION
■ Despite such intervention by the vehicle electric system management, the
vehicle battery may be drained. For example, when the ignition is switched on
a long time with the engine turned off or the side or parking lights are turned
on during longer parking.■
Consumers that are supplied via a 12-V power socket can cause the vehicle
battery to discharge when the ignition is switched off.
153Inspecting and replenishing
The jump-start cable must be connected to the engine earthing point C» Fig. 172 only on vehicles with the START-STOP system.
Starting engine›
Start the engine on the vehicle providing the power and allow it to idle.
›
Start the engine of the vehicle with the discharged battery.
›
If the engine does not start, halt the attempt to start the engine after 10 sec-
onds and wait for 30 seconds before repeating the process.
›
Remove the jump start cables in the reverse order as attachment.
Engines in vehicles with the vehicle battery in the boot
The positive terminal
A
is located under a cover in the engine compartment
» Fig. 173 .
›
Unlock the retainer tab on the cover in direction of arrow
1
.
›
Open the cover in the direction of the arrow
2
.
›
Clamp the positive terminal of the jumper cable to the position
A
» Fig. 173 .
›
Clamp the negative terminal of the jumper cable to the earthing point of the
engine
D
» Fig. 172 or to a metal part firmly connected to the engine block or
directly to the engine block.
›
Remove the jump start cables in the reverse order as attachment.
Both batteries must have a rated voltage of 12 V. The capacity (Ah) of the bat-
tery supplying the power must not be significantly less than the capacity of
the discharged battery in your vehicle.
Jump-start cables
Only use jump-start cables which have an adequately large cross-section and
insulated terminal clamps. Observe the instructions of the jumper lead manu-
facturer.
Positive cable – colour coding in the majority of cases is red.
Negative cable – colour coding in the majority of cases is black.
WARNING■
Do not clamp the jump-start cable to the negative terminal of the dis-
charged battery. There is the risk of detonating gas seeping out of the bat-
tery being ignited by the strong spark resulting from the engine being star-
ted.■
The non-insulated parts of the terminal clamps must never touch each
other – there is a risk of short circuit!
WARNING (Continued)■ The jump-start cable connected to the positive terminal of the battery
must not come into contact with electrically conducting parts of the vehicle
– there is a risk of short circuit!■
Route the jump-start cables so that they cannot be caught by any rotat-
ing parts in the engine compartment.
Towing the vehicle
Introduction
Fig. 174
Braided tow rope / Spiral tow rope
This chapter contains information on the following subjects:
Front towing eye
170
Rear towing eye
171
Vehicles with a tow hitch
171
For towing a braided tow rope is to be used » Fig. 174-
.
When towing, the following guidelines must be observed.
Vehicles with manual transmission may be towed in with a tow bar or a tow
rope or with the front or rear wheels raised.
Vehicles with automatic transmission may be towed in with a tow bar or a tow
rope or with the front wheels raised. If the vehicle is raised at the rear, the au-
tomatic gearbox will be damaged! If possible, the vehicle should be towed with
the engine running or at least with the ignition on.
Driver of the tow vehicle
›
Engage the clutch gently when starting off or depress the accelerator partic-
ularly gently if the vehicle is fitted with an automatic gearbox.
169Emergency equipment and self-help
Hill Start Assist (HHC)111
Hitch121
Drawback load121
Hooks83
Horn27
I
Ice scrapers
136
Ignition lock96
Immobilizer95
Indicator lights31
Individual settings Locking
52
Unlocking52
Inertia reels13
Information system39
Compass point display45
Door warning39
Gear recommendation39
MAXI DOT display42
Multifunction display40
operation40
Service interval display46
Information system operation40
Infotainment4
Instrument cluster28
Auto-check control39
Counter for distance driven30
Display29
Fuel gauge30
Indicator lights31
Overview28
Revolution counter29
see instrument cluster28
Temperature gauge29
Interior care138
Natural leather138
interior light Front
63
Interior monitor54
iPad holder Behind the headrests
80
Handling80
ISOFIX22
J
Jack
161
Maintenance137
Jacking points Raise vehicle
164
Jump-starting168
K
KESSY Locking
51
Unlocking51
Key Lock
50
Start the engine96
Stopping the engine96
Switch off the ignition96
Switch on the ignition96
Unlock50
L
Lamp failure Warning light
37
Lamps Warning light
37
Leather Natural leather care
138
LEAVING HOME62
Lever Main beam
60
Turn signal60
Windscreen wipers66
Light COMING HOME / LEAVING HOME62
Daytime running lights60
Fog Lights61
Headlights with CORNER function62
Parking light63
Rear fog light61
Lighting Luggage compartment
81
Lights59
Automatic driving lamp control61
Beam range adjustment59
Cockpit63
Hazard warning light system62
Headlight flasher60
Indicator lights31
Low beam59
Main beam60
Parking light59
Replacing bulbs177
switching on/off59
Turn signal60
Load184
Lock Key
50
Locking Individual settings
52
KESSY51
Remote control50
Locking and unlocking the vehicle from the in- side
51
Locking the door without a locking cylinder Emergency
172
Low beam59
Low temperature warning indicator Warning light
38
Low tyre pressure warning refer to the tyre pressure monitoring
119
194Index
Selector leverRefer to Selector lever104
Selector lever lock (automatic gearbox) Warning light
35
Service131
Service interval display46
Warning light38
Setting Lower position of the variable loading floor
87
Seat belt height12
seats and head restraints69
Upper position of the variable loading floor87
Settings Interior mirror
67
Setting the Clock
31
Side airbag16
SmartGate Connection by searching for a Wi-Fi network
47
introductory information47
Password/PIN code change49
Setting48
Wi-Fi Direct48
SmartLink see Infotainment
4
Snow chains159
Spare wheel157
Remove162
Stow162
Speed control system114
Speed symbol Refer to Wheels
158
Spoiler132
Stabilisation system109
Stability Control (ESC)110
Staring engine Jump-starting
168
START-STOP99
Jump-starting168
Manually deactivating/activating the system101
operation100
Warning light38
START-STOP system99
Starter button Problems with the engine start
99
Steering column lock locking97
Steering column lock unlocking97
Switching off the engine98
Switch off the ignition98
Switch on the ignition98
Starting and stopping the engine at the push of the button
97
Starting and stopping the engine using the key 95
Starting engine Jump-starting
168
Starting the engine Starter button
98
START STOP Information messages
101
Start the engine Key
96
Steering column lock locking Starter button
97
Steering column lock unlocking Starter button
97
Steering lock locking Key
96
Steering lock unlocking Key
96
Steering wheel correct posture
9
setting9
Stop see Parking
103
Stopping the engine Key
96
Storage73
Storage compartment Glasses compartment
78
in the boot85
in the centre console74
in the front arm rest77
on the front passenger side78
Storage compartments73
Storage net bag85
Stowage compartments in the doors
73
Sun visors65
Switching off the engine Starter button
98
Switch light on/off59
Switch off the ignition Key
96
Starter button98
Switch on the ignition Key
96
Starter button98
T
Tablet holder Behind the headrests
80
Handling80
Taking care of your vehicle Automatic car wash system
134
High-pressure cleaner134
Washing by hand133
Wash system134
TCS Operation
110
Warning light33
Technical data183
Time31
Tiptronic105
Tools161
TOP TETHER24
Towing169
Towing a trailer128
197Index