›The current consumption is too high.
› High air-conditioning or heating capacity (high fan speed, big difference be-
tween the desired and actual indoor temperature).
Information about the current status of the system can be displayed in the In-
fotainment display » operating instructions for Infotainment , chapter Vehicle
settings (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 sys-
tem.■
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.
■
After the manual engine start and with a manual gearbox the automatic en-
gine shutdown can take place only when a minimum distance required for the
system function has been covered.
Operation in vehicles with manual gearbox
Read and observe
on page 124 first.
In compliance with the operating conditions, automatic engine shutdown / au-
tomatic engine start takes place as described.
Automatic engine shut down
›
Stop the vehicle.
›
Shift the gear lever to Neutral.
›
Release the clutch pedal.
Automatic engine shutdown then occurs and the indicator symbol appears in
the display
» Fig. 125 on page 124 .
Automatic engine start
›
Depress the clutch pedal.
The automatic re-start process takes place and the indicator symbol goes
out.
Operation in vehicles with automatic gearbox
Read and observe
on page 124 first.
In compliance with the operating conditions, automatic engine shutdown / au-
tomatic engine start takes place as described.
Automatic engine shut down
›
Bring the vehicle to a stop and depress the brake pedal.
Automatic engine shutdown then occurs and the indicator symbol appears in
the display
» Fig. 125 on page 124 .
Automatic engine start
›
Release the brake pedal.
The automatic re-start process takes place and the indicator symbol goes
out.
Further information on automatic transmission
Engine shut down takes place when the selector lever is in positions P, D/S , 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. The engine starts automatically by pressing
the gas pedal or by moving the selector lever into a different mode and releas-
ing the brake pedal.
If the engine is off due to the automatic and the selector lever is put to the R
position, then the automatic start up of the engine.
If the gear selector is moved from position R to the position D/S or N the vehi-
cle must reach a speed of more than 10 km/h before the automatic engine
shutdown starts.
There is no automatic engine shutdown when the system detects a vehicle
moving due to a large steering angle.
No automatic engine shutdown takes place when the vehicle is moving at low
speed (e.g. during a traffic jam or when turning) and remains stationary after
pressing the brake pedal lightly. Automatic engine shutdown takes place if you
press the brake pedal down with more force.
125Assist systems
Checking the battery electrolyte levelFig. 151
Electrolyte level indicator
Read and observe and on page 158 first.
On vehicles with a vehicle battery fitted with a colour indicator, » Fig. 151 the
colouring of the display can indicate the acidic level.
Air bubbles can influence the colour of the indicator. For this reason carefully knock on the indicator before carrying out the check.
› Black colour - electrolyte level is correct.
› Colourless or light yellow colour - electrolyte level too low, the battery must
be replaced.
Vehicles with a START-STOP system are fitted with a battery control unit for
checking the energy level for the recurring engine start.
We recommend you have the electrolyte level checked by a specialist garage from time to time, especially in the following cases.
› High external temperatures.
› Longer day trips.
› After each charge.
Winter time
The vehicle battery only has some of its starting power at low temperatures. A
discharged vehicle battery may 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.
Note
■ The battery electrolyte level is also periodically checked by a specialist ga-
rage as part of the Inspection Service.■
For technical reasons, on vehicles with the description “AGM”, the electrolyte
level cannot be checked.
Charging
Read and observe
and on page 158 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 the
charger on.
›
Once charging is complete: Switch off the charger and remove the mains ca-
ble 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 charger manufacturer's instructions .
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.
159Inspecting and replenishing
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 or additional heating (auxiliary heat-
ing), 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 176 .
Replacing
Read and observe
and on page 158 first.
The new vehicle battery must have the same capacity, voltage, current and the
same size as the original battery. Suitable vehicle battery types can be pur-
chased from a specialist garage.
We recommend that the battery is replaced by a specialist garage, where the
new vehicle battery will be installed properly and the original battery will be
disposed of in accordance with national regulations.
Disconnecting or reconnecting
Read and observe
and on page 158 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 / deviceOperating measureElectric window levers» page 58RadioEnter code » operating instruc-
tions for the Infotainment dis-
play radioTime settings» page 33
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 158 first.
The vehicle voltage control unit automatically prevents the battery from dis-
charging when the battery is subjected to heavy loads. This may be noticed
from the following.
› The idling speed is raised to allow the generator to deliver more electricity to
the electrical system.
› Where appropriate large convenience consumers, e.g. seat heaters, rear win-
dow heaters, have their power limited or shut off completely if necessary.
160General Maintenance
›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.›
Detach the jumper cables in the exact reverse order that they were attached.
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. Obey the instructions of the jump start cable 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 the battery
being ignited by the strong spark which results from the engine being star-
ted.■
The non-insulated parts of the terminal clamps must never touch each
other – risk of short circuit.
■
The jump-start cable connected to the positive terminal of the battery
must not come into contact with electrically conducting parts of the vehicle
– risk of short circuit.
■
Route the jump-start cables so that they cannot be caught by any rotat-
ing parts in the engine compartment.
■
There must not be any contact between the two vehicles otherwise cur-
rent may flow as soon as the negative terminals are connected.
Towing the vehicle
Introduction
Fig. 168
Braided tow ropes/spiral tow rope
This chapter contains information on the following subjects:
Front towing eye
178
Rear towing eye
179
Vehicles with a tow hitch
179
A braided tow rope must be used for towing » Fig. 168 -
.
The following guidelines must be observed when towing.
Vehicles with manual transmission may be towed with a tow bar or a tow rope
or with the front or rear wheels raised.
Vehicles with automatic transmission may be towed with a tow bar or a tow
rope or with the front wheels raised. If the vehicle is raised at rear, the auto-
matic gearbox is damaged!
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.
›
Only then, approach correctly when the rope is taut.
The maximum towing speed is 50 km/h.
Driver of the towed vehicle
›
Switch on the ignition so that the steering wheel is not locked and so that
the turn signal lights, windscreen wipers and windscreen washer system can
be used.
177Emergency equipment, and self-help
Taking care of your vehicleAutomatic car wash system141
High-pressure cleaner141
Washing by hand141
Wash system141
TCS Operation
115
Warning light35
Technical data194
Tiptronic112
Tools168
TOP TETHER26
Towing177
Towing a trailer135
Towing device Accessories
133
Description129
Operation and maintenance145
Towing eye Front
178
Rear179
Towing protection55
Traction Control System (TCS)115
Trailer134
13-pin socket 134
connect and disconnect134
Loading135
Safety eye134
Towing a trailer135
Trailer operation129
Transmission Warning messages
39
Transport Luggage compartment
84
Roof rack93
Transporting76
Transporting children safely22
Triangle167
Turning signal system Warning light37
Turn signal62
Turn signal system Warning light
37
Tyre Damage
163
Explanation of the labelling164
see wheels164
Tyre load-bearing capacity see Wheels
164
Tyre pressure162
Warning light37
Tyre pressure monitor refer to the tyre pressure monitoring
127
Tyre pressure monitoring127
Display37
Infotainment display128
Save tyre pressure values127
Save tyre pressure values - button128
Save tyre pressure values - Infotainment128
Tyre repair General notes
174
Preparations175
Pressure test175
Sealing and inflating the tyre175
Tyres161
new113
Tyre pressure162
Wear and tear162
Wear indicators163
Tyre size164, 165
see wheels164, 165
U
Under-body Vehicle care
145
Under-body protection145
Unlocking Individual settings53
KESSY52
Key50
Remote control50
Unlocking and locking49
Used vehicles Acceptance and recycling
140
Useful equipment Ashtray
79
Car park ticket holder76
Cigarette lighter78
Clothes hook82
Cup holders78
Glasses compartment81
Multimedia holder80
Storage compartment76
Useful Features 12-volt power outlet
79
Using the information system43
Using the selector lever111
V
Variable loading floor
89
Inserting90
Lower position90
Removing90
Upper position89
Vehicle battery Automatic load deactivation
160
Charge level indicator33
Charging159
Checking the battery electrolyte level159
Cover158
Disconnecting and reconnecting160
Operation in winter159
Replacing160
Safety instructions157
Warning icon39
209Index