auxiliary battery MERCEDES-BENZ E-CLASS CABRIOLET 2015 Owners Manual

Remote control .............................. 133
Setting the departure time ............
.134
Switching on/off (on the centre
console) ......................................... 133
Auxiliary ventilation
Activating/deactivating ................. 133
Axle load, permissible (trailer tow-
ing) ...................................................... 344 B
Back button ....................................... 264
Bag hook ............................................ 276
Ball coupling
Folding in ....................................... 211
Folding in/out ................................ 210
Folding out ..................................... 210
BAS (Brake Assist System) ................. 62
BAS PLUS (Brake Assist System
PLUS) with Cross-Traffic Assist
Function/notes ................................ 62
BAS PLUS with Cross-Traffic Assist
(Brake Assist PLUS with Cross-
Traffic Assist)
Important safety notes .................... 63
Battery (key)
Checking .......................................... 77
Important safety notes .................... 77
Replacing ......................................... 77
Battery (vehicle)
Charging ........................................ 312
Display message ............................ 239
Important safety notes .................. 310
Jump starting ................................. 313
Belt
see Seat belts
Belt tensioner
Activation ......................................... 45
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 222
Display message ............................ 242
Notes/function .............................. 200
Trailer towing ................................. 202
see Active Blind Spot Assist
BlueTEC (AdBlue ®
) ............................ .340 Bluetooth
®
Connecting another mobile
phone ............................................ 267
Searching for a mobile phone ....... .266
See also Digital Owner's Manual ... 263
Telephony ...................................... 266
Bonnet
Active bonnet (pedestrian protec-tion) ............................................... 289
Closing .......................................... .291
Display message ............................ 250
Important safety notes .................. 289
Opening ......................................... 290
Boot
Emergency release .......................... 84
Important safety notes .................... 82
Locking separately ........................... 83
Opening (automatically from
inside) .............................................. 83
Opening/closing (manually from
outside) ............................................ 83
Boot lid
Display message ............................ 250
Opening dimensions ..................... .342
Boot load (maximum) ........................ 342
Boot separator
Display message ............................ 252
General notes .................................. 94
Opening/closing .............................. 94
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 232
Notes ............................................. 341
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive .......................................... .66
Display message ............................ 236
Brakes
ABS .................................................. 62
Adaptive Brake Assist ...................... 66
BAS .................................................. 62
BAS PLUS with Cross-Traffic
Assist ............................................... 62
Brake fluid (notes) ........................ .341
Display message ............................ 230 Index
5

Pulling away
Automatic transmission ................. 141
General notes ................................ 141
Manual transmission ......................1 41Q
QR code Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 27
Qualified specialist workshop ........... 27R
Radiator cover ................................... 291
Radio
Selecting a station ......................... 218
see separate operating instructions
Radio mode
See also Digital Owner's Manual ... 263
Radio-based vehicle components
Declaration of conformity ................ 26
Reading lamp ..................................... 118
Rear compartment
Setting the temperature ................ 128
Rear foglamp
Display message ............................ 236
Switching on/off ........................... 115
Rear seat
Display message ............................ 250
Rear window heating
Problem (fault) ............................... 131
Switching on/off ........................... 130
Rear-compartment seat belt sta-
tus indicator ........................................ 42
Rear-view mirror
Anti-dazzle mode (automatic) ....... .111
Dipping (manual) ........................... 110
Refuelling
Fuel gauge ....................................... 31
Important safety notes .................. 154
Refuelling process ......................... 155
see Fuel
Remote control
Auxiliary heating/ventilation .......... 133
Changing the batteries (auxiliary
heating) ......................................... 135
Garage door opener ....................... 282 Programming (garage door
opener) .......................................... 283
Replacing bulbs
Important safety notes .................. 119
Overview of bulb types .................. 119
Replacing the battery (auxiliary
heating remote control) .................... 135
Rescue card ......................................... 27
Reserve (fuel tank)
see Fuel
Reserve fuel
Display message ............................ 239
Warning lamp ................................. 259
Residual heat (climate control) ........132
Restraint system
Display message ............................ 235
Introduction ..................................... 37
Problem (malfunction) ................... 258
Warning lamp (function) ................... 38
Rev counter ........................................ 213
Reverse gear
Engaging (manual transmission) .... 146
Reversing camera
Cleaning instructions ..................... 300
Display in the multimedia system .. 189
Function/notes ............................ .188
Switching on/off ........................... 188
Reversing feature
Side windows ................................... 85
Reversing lamp (display message) .. 236
Roll bar
Display message ............................ 234
Operation ......................................... 45
Roof
Overview .......................................... 88
see Soft top
Roof lining and carpets (cleaning
instructions) ...................................... 303
Roof load (maximum) ........................ 342
Route guidance
See also Digital Owner's Manual ... 263 S
Safety Children in the vehicle ..................... 49
see Occupant safety 16
Index

X
Convenience opening feature: press and
hold the gbutton until the side windows
are opened. The side windows move back to
their original positions.
The indicator lamp above the gbutton
goes out. Air-recirculation mode is deactiva-
ted.
i If you open the side windows manually after
closing them using the convenience closing
feature, they will remain in this position when
opened using the convenience opening fea-
ture. Switching the residual heat on/off
General notes It is possible to make use of the residual heat of
the engine to continue heating the vehicle for
approximately 30 minutes after the engine has
been switched off. The heating time depends on
the set interior temperature.
The "residual heat" function only functions opti- mally with the side windows closed.
The "residual heat" function only functions opti-
mally with the soft top closed.
Activating/deactivating X
Turn the key to position 0in the ignition lock
or remove it (Y page 139).
X To switch on: press theÌbutton.
The indicator lamp above the Ìbutton
lights up.
i If the residual heat function is switched on,
the windows may mist up on the inside.
i The blower will run at a low speed regardless
of the airflow setting.
i If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
X To switch off: press theÌbutton.
The indicator lamp above the Ìbutton
goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R when the auxiliary heating is switched on Auxiliary heating
Important safety notes G
DANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes can enter the vehicle, especially car-
bon monoxide. This is the case, e.g. in
enclosed spaces, or if the vehicle is stuck in
snow. There is a risk of fatal injuries.
You should switch off the auxiliary heating in
enclosed spaces which do not have an extrac- tion system, e.g. a garage. If the vehicle is
stuck in snow and you must leave the auxiliary
heating running, keep the exhaust pipe and
the area around the vehicle clear of snow. To guarantee a sufficient supply of fresh air, open
a window on the side of the vehicle away from the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot.
Flammable materials such as leaves, grass or twigs may ignite if they come into contact
with:
R hot parts of the exhaust system
R the exhaust gas itself
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that:
R no flammable materials come into contact
with hot vehicle components
R the exhaust gas can escape from the
exhaust pipe unhindered
R the exhaust gas does not come into contact
with flammable materials.
The auxiliary heating and the exhaust gas dis-
charge location can be found in front of the right- hand front wheel.
! Operating the auxiliary heating/ventilation
draws on the vehicle battery. After you have
heated or ventilated the vehicle a maximum of two times, drive for a longer distance. 132
Operating the climate control systemClimate control

R
the remote control being in an unfavourable
position in relation to the vehicle
R transmitting from an enclosed space
If the remote control battery is low, the battery
symbol on the left of the display is shown as
empty. Replace the remote control battery and
observe the important safety notes when doing so (Y page 135).
Switching the auxiliary heating/ventila-
tion on or off Remote control
:
Display
; u Switches on the auxiliary heating or
auxiliary ventilation
Checks the status
= . Sets the departure time
? ^ Switches off the auxiliary heating or
auxiliary ventilation
A , Sets the departure time
X To switch on: press and hold the ubut-
ton.
ON is shown in the remote control display.
X To switch off: press and hold the ^but-
ton.
OFF is shown in the remote control display.
Checking the status of the auxiliary heat- ing or auxiliary ventilation
X Briefly press the ubutton.
The following messages may appear in the dis-
play: Display Meaning
The auxiliary heating or
auxiliary ventilation is
switched off. The auxiliary ventilation is
switched on. The number
in the display shows the
remaining time (in
minutes) for the auxiliary
ventilation.
The auxiliary heating is
switched on. The number
in the display shows the
remaining time (in
minutes) for the auxiliary
heating.
A departure time has been
activated. The departure
time appears in the dis-
play. A departure time has been
activated. The auxiliary
ventilation is currently
activated. The number in
the display shows the
remaining time (in
minutes) for the auxiliary
ventilation. If the vehicle is
not started after this time, the running time is
increased by five minutes. A departure time has been
activated. The auxiliary
heating is currently activa-
ted. The number in the dis- play shows the remaining
time (in minutes) for the
auxiliary heating. If the
vehicle is not started after
this time, the running time is increased by five
minutes. If the engine has not yet reached operating tem-
perature when it is started, the auxiliary heating running time is increased. The auxiliary heating
continues to run until the operating temperature
is reached. If this is the case, the ysymbol
appears in the remote control display and the
running time is zero minutes.
Setting the departure time
Make sure that the time set in the vehicle is
correct before setting the departure time (see
the separate operating instructions). Otherwise, the auxiliary heating may switch on at the wrong 134
Operating the climate control systemClimate control

time and at an unsuitable location. When setting
the departure time, also observe the important
safety notes (Y page 132).
X Briefly press the ubutton.
X Press the ,or. button repeatedly
until the time to be changed appears in the
display.
X Press the uand^ buttons simultane-
ously.
The Îsymbol in the remote control display
flashes.
X Press the ,or. button to set the
desired departure time.
i The longer you press the
,or. but-
ton, the faster the time changes.
X Press the uand^ button simultane-
ously.
The new departure time is stored.
Activating the set departure time
X Briefly press the ubutton.
X Press the ,or. button repeatedly
until the desired departure time appears in
the display.
X Press the ubutton.
The Ísymbol, the departure time and,
depending on the selected departure time,
the letter A, BorCappear in the display.
Deactivating the set departure time
X Briefly press the ubutton.
The status of the auxiliary heating is shown in the display.
X Press the .button.
The first departure time stored appears in the
display.
X Press the ^button.
OFF is shown in the remote control display.
Replacing the remote control battery Important safety notes
G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury. Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in anenvironmentally responsible
recycling system. Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
Replacing the battery A CR2450 lithium battery is required when
replacing the battery.
X Press a pointed object into recess :.
X Slide battery cover ;backwards in the direc-
tion of the arrow.
X Insert new battery =with the lettering facing
upwards.
X Slide battery cover ;in the opposite direc-
tion to the arrow on the remote control until it engages. Operating the climate control system
135Climate control Z

Problems with the auxiliary heating/ventilation
Problem
Possible causes/consequences and
M
MSolutions FAIL
¨ The signal transmission between the transmitter and the vehicle is
faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary. FAIL The auxiliary heating cannot be switched on or has switched itself off.
The starter battery is not sufficiently charged.
X Charge the starter battery. The fuel tank content is below the reserve fuel level.
X Refuel at the nearest filling station. The auxiliary heating or auxiliary ventilation is faulty.
X Have the auxiliary heating or auxiliary ventilation checked at a
qualified specialist workshop. Air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air vents. This could result in burns or frostbite in the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet between the windscreen and
the bonnet free of blockages, such as ice,
snow or leaves.
R never cover the vents or ventilation grilles in
the vehicle interior. Adjusting the air vents
Example
:
Demister vent
; Side air vent
= Thumbwheel for side air vent
X To open or close: turn thumbwheel=up or
down. Adjusting the glove compartment air
vent
! Close the air vent when heating the vehicle.
At high outside temperatures, open the air
vent and activate the "cooling with air dehu-
midification" function. Otherwise, tempera-
ture-sensitive items stored in the glove com-
partment could be damaged. 136
Air ventsClimate control

X
Press the :or9 button to select the
Automatic door locks
Automatic door locks function.
If the Autom. locking
Autom. locking function is switched
on, the multifunction display shows the vehi-
cle's doors in orange.
X Press the abutton to save the setting.
If you activate the Auto.
Auto. door
doorlocks
locks function,
the vehicle is centrally locked above a speed of around 15 km/h.
For further information on the automatic locking feature; see (Y page 82).
Activating/deactivating the acoustic
locking confirmation If you switch on the Acoustic AcousticLock
Lockfunction, an
acoustic signal sounds when you lock the vehi-
cle.
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Vehicle
Vehicle submenu.
X Press ato confirm.
X Press the :or9 button to select the
Acoustic Lock
Acoustic Lock function.
If the Acoustic Lock
Acoustic Lock function is activated,
the & symbol in the multifunction display
lights up orange.
X Press the abutton to save the setting.
Heating Auxiliary heating departure time
G
DANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes can enter the vehicle, especially car-
bon monoxide. This is the case, e.g. in
enclosed spaces, or if the vehicle is stuck in
snow. There is a risk of fatal injuries.
You should switch off the auxiliary heating in
enclosed spaces which do not have an extrac- tion system, e.g. a garage. If the vehicle is
stuck in snow and you must leave the auxiliary
heating running, keep the exhaust pipe and
the area around the vehicle clear of snow. To guarantee a sufficient supply of fresh air, open
a window on the side of the vehicle away from the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot.
Flammable materials such as leaves, grass or twigs may ignite if they come into contact
with:
R hot parts of the exhaust system
R the exhaust gas itself
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that:
R no flammable materials come into contact
with hot vehicle components
R the exhaust gas can escape from the
exhaust pipe unhindered
R the exhaust gas does not come into contact
with flammable materials.
! Operating the auxiliary heating/ventilation
draws on the vehicle battery. After you have
heated or ventilated the vehicle a maximum of two times, drive for a longer distance.
Only vehicles with auxiliary heating have this
function.
In the Heating Heating submenu, you can select a
stored departure time or change a departure
time.
The auxiliary heating timer function calculates
the switch-on time according to the outside
temperature so that the vehicle is preheated by the departure time. When the departure time isreached, the auxiliary heating continues to heat
for a further five minutes and then switches off. The auxiliary heating adopts the THERMATIC orTHERMOTRONIC temperature setting.
You can switch off the auxiliary heating by using
the remote control or the auxiliary heating but-
ton on the centre console.
i Switch the auxiliary heating on regularly
once a month for about ten minutes.
Further information on auxiliary heating
(Y page 132). 226
Menus and submenusOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions #
See Owner's Manual See Owner's Manual The battery is not being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 157).
X Consult a qualified specialist workshop. #
Stop vehicle See Stop vehicle See
Owner's Manual Owner's Manual The battery is no longer being charged and the battery charge level is
too low.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 157).
X Observe the instructions in the #See SeeOwner's
Owner's Manual
Manualdisplay
message.
X Consult a qualified specialist workshop. 4
Check Check
eng.
eng.oil
oillev.
lev.
when
when next
nextrefuelling
refuelling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X Check the oil level when next refuelling, at the latest (Y page 291).
X If necessary, top up the engine oil (Y page 292).
X Have the engine checked at a qualified specialist workshop if the
engine oil needs topping up more often than usual.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes-
benz.com. 8
Reserve fuel level Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops
into the reserve range.
X Refuel at the nearest filling station. C There is very little fuel in the fuel tank.
The auxiliary heating cannot be operated.
X Refuel at the nearest filling station without fail. Display
messages
239On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Risk of vehicle
Risk of vehicle
rolling rolling
Transmission Transmission
not
notin
in
P
P The driver's door is open or not fully closed and the transmission is in
position R,Nor D.
A warning tone also sounds.
G WARNING
The vehicle may roll away.
There is a risk of an accident.
X Shift the transmission to position P.
X Safeguard the vehicle against rolling away (Y page 157).
X Close the driver's door fully. Only
Only
select
select Park
Park(P)
(P)
when
when vehicle
vehicle is
issta‐
sta‐
tionary
tionary The vehicle is moving.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position P.Without changing Without changing
gear, gear,
consult workshop consult workshop You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position
Dis selected:
X Drive to a qualified specialist workshop without shifting the trans-
mission from position D.
If transmission position R,Nor Pis selected:
X Safeguard the vehicle against rolling away (Y page 157).
X Consult a qualified specialist workshop. Reversing not poss. Reversing not poss.
consult workshop consult workshop You cannot shift into the transmission position
Rdue to a malfunction.
The transmission positions P,N or Dcontinue to be available.
A warning tone also sounds.
X Consult a qualified specialist workshop. Transmission Mal‐
Transmission Mal‐
function Stop function Stop A malfunction has occurred in the mechanical transmission compo-
nents.
A warning tone also sounds. The transmission shifts automatically to position N.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position P.
X Safeguard the vehicle against rolling away (Y page 157).
X Consult a qualified specialist workshop. Auxiliary battery Auxiliary battery
Malfunction
Malfunction The auxiliary battery for the transmission is no longer being charged.
X Consult a qualified specialist workshop at the next opportunity.
X Until then, set the transmission to position Pbefore you switch off
the engine.
X Before leaving the vehicle, apply the parking brake. Display
messages
249On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions j
Check Check
trailer
trailer hitch
hitch
lock
lock The trailer tow hitch is not correctly engaged.
A warning tone also sounds.
G WARNING
If the ball coupling is not engaged, the trailer may come loose. There
is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Apply the parking brake.
X Engage the trailer coupling's ball coupling in the end position
(Y page 210). &
inoperative inoperative
Battery
Battery
Low
Low The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on (Y page 132).
X Drive for a considerable distance.
The battery charges. The auxiliary heating is operational again as
soon as the on-board electrical system voltage is sufficient. &
inoperative Refuel inoperative Refuel
vehicle vehicle There is too little fuel in the fuel tank. The auxiliary heating cannot be
switched on (Y page 132).
X Refuel at the nearest filling station. &
inoperative inoperative
See
SeeOwn‐
Own‐
er's Man.
er's Man. The auxiliary heating is temporarily malfunctioning or faulty.
X When the vehicle is on a level surface and the engine has cooled
down, make up to four attempts to switch on the auxiliary heating,
waiting several minutes between each attempt (Y page 132).
X If the auxiliary heating does not switch on, consult a qualified spe-
cialist workshop. Telephone Telephone
No
Noservice
service Your vehicle is outside the network provider's transmitter/receiver
range.
X Wait until the mobile phone operational readiness symbol appears
in the multifunction display. Ð
Power steering mal‐ Power steering mal‐
function See Own‐ function See Own‐
er's Manual er's Manual The power steering assistance is faulty.
A warning tone also sounds.
G WARNING
You will need to use more force to steer.
There is a risk of an accident.
X Check whether you are able to apply the extra force required.
X If you are able to steer safely: carefully drive on to a qualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. Display
messages
251On-board computer and displays Z