2012 MERCEDES-BENZ E-CLASS CABRIOLET radiator

Fuel
Additives ........................................ 373
Consumptio ninformation ..............374
Consumption statistics ..................233
Displaying the current consump-
tion ................................................ 234
Displaying the range ......................234
Fuel gauge ............................... 30, 229
Grade (petrol) ................................ 372
Important safety notes ..................372
Problem (malfunction) ...................176
Quality (diesel )............................... 373
Refuelling ...................................... .173
Tank content/reserve fuel .............372
Fuel filler flap
Opening/closing ............................ 174
Fuel filte r(white display message) .262
Fuel level Calling up the range (on-board
computer) ...................................... 234
Gauge ...................................... 30, 229
Fuel reserve
see Fuel
Fuel tank
Capacity ........................................ 372
Problem (malfunction) ...................176
Fuse allocation chart (vehicle tool
kit) ...................................................... 323
Fuses Allocation chart ............................. 336
Before changing ............................. 336
Dashboard fuse box .......................336
Fuse box in the boot ......................337
Fuse box in the engine compart-
ment .............................................. 337
Important safety notes ..................336 G
Garage door opener Clearing the memory .....................299
Frequencies ................................... 299
Important safety notes ..................297
Opening/closing the garage door ..299
Programming (button in the rear-
view mirror) ................................... 297
Genuine Mercedes-Benz parts .........368
Glove compartment ..........................287 H
Handbrake see Parking brake
Hazard warning lamps ......................127
Headbag Display message ............................ 255
Operation ........................................ .46
Headlamp
Cleaning system (function) ............128
Cleaning system (notes) ................377
Headlamps
Misting up ...................................... 131
Topping up the cleaning system ....310
see Automatic headlamp mode
Head level heating (AIRSCARF) ........115
Head restraint Lowering manually (rear) ...............111
Head restraints
Adjusting ....................................... 111
Adjusting (electrically). ..................111
Adjusting (manually). .....................111
Adjusting (rear) .............................. 111
see NECK-PR Ohead restraints
Heating
see Climate control
High-pressure cleaners ....................313
Hill start assist .................................. 162
HOLD function Display message ............................ 263
Function/notes ............................. 198 I
Ignition lock see Key positions
Immobiliser .......................................... 71
Indicator and warning lamps Coolant .......................................... 281
DISTRONI CPLUS ........................... 283
Engine diagnostics .........................280
Indicator lamps
Display message ............................ 256
see Warning and indicator lamps
Insectp rotection on the radiator ....308
Inspection see ASSYST PLUS Index
11

Senso
rrang e................................. 200
Trailer towing ................................. 202
Warning displa y............................. 201
PASSENGE RAIRBAG OFF warning
lamp ...................................................... 56
Petrol .................................................. 372
Plastic trim (cleaning instructions) .318
Power windows see Side windows
PRE-SAFE ®
(preventive occupant
safety system) Display message ............................ 253
Operation ........................................ .48
PRE-SAFE ®
Brake
Activating/deactivating .................240
Display message ............................ 253
Function/notes ................................ 69
Warning lamp ................................. 283
Product information ............................21
Program selector button ..................169
Protection of the environment General notes .................................. 21
Pulling away
Automatic transmission .................161
Manual transmission ..................... .161 Q
Qualifie dspecialis tworkshop ...........23 R
Radar sensors Overview ........................................ 382
Radar sensor system
Activating/deactivating .................245
Display message ............................ 263
Radiator cover ................................... 308
Radio Selecting astation ......................... 236
see separate operating instructions
Rain closing feature
Panorama sliding sunroo f.............. 104
Reading lamp ..................................... 131
Rear compartment Setting the airv ents...................... 154
Setting the temperature ................144Rear-compartment seat belt sta-
tus indicator
........................................ 52
Rear foglamp Display message ............................ 258
Switching on/off ........................... 125
Rear seat
Display message ............................ 271
Rear-view mirror
Anti-dazzle mode (automatic) ........119
Dipping (manual) ........................... 117
Rear window blind ............................293
Rear window heating Problem (fault) ............................... 147
Switching on/off ........................... 147
Refuelling
Fuel gauge ............................... 30, 229
Important safety notes ..................173
Refuelling proces s......................... 174
see Fuel
Releasing the parking loc kman-
ually (automatic transmission) ........173
Remote control Auxiliary heating/ventilation .......... 150
Changing the batteries (auxiliary
heating) ......................................... 151
Garage door opener .......................297
Programming (garage door
opener) .......................................... 297
Replacing the battery (auxiliary
heating remote control) .................... 151
Reserve (fuel tank) see Fuel
Reserve fuel
Display message ............................ 261
Warning lamp ................................. 281
Residual heat (climate control) ........148
Restraint system see SRS (Supplemental Restraint
System)
Rev counter ........................................ 231
Reverse gear Engaging (automatic transmis-
sion) ............................................... 168
Engaging (manual transmission) ....167 Index
15

LIM (cruise control) ........................ 183
LIM (DISTRONIC PLUS)
..................190
LIM (variable SPEEDTRONIC) .........186
Overview .................................. 32, 275
PASSENGER AIRBAG OFF ................56
Reserve fuel ................................... 281
Seat bel t........................................ 276
SRS ................................................ 280
Warning triangle ................................ 322
Washer fluid Display message ............................ 273
Wheel bol ttightening torque ...........350
Wheel chock ...................................... 347
Wheels Changing/replacing .......................346
Changing awheel .......................... 346
Checking ........................................ 341
Cleaning ......................................... 315
Cleaning (warning) .........................346
Emergency spare wheel .................363
Fitting anew wheel ........................ 349
Fitting awheel ............................... 346
Important safety notes ..................340
Removing awheel .......................... 349
Storing ........................................... 346
Tightening torque ........................... 350
Whee lsize/tyre size ...................... 350
Wind deflector
see AIRCAP
Wind deflector (cleaning instruc-
tions) .................................................. 315
Windowbag Operation ........................................ .47
Windows
Cleaning ......................................... 316
see Side windows
Windscreen
Demisting ...................................... 146
Windscreen washe rfluid
see Windscreen washer system
Windscreen washer system
Notes ............................................. 377
Topping up ..................................... 310
Windscreen wipers
Problem (malfunction) ...................136
Replacing the wiper blades ............136
Switching on/off ........................... 135Winter operation
Important safety notes ..................342
Radiator cover ............................... 308
Slippery road surfaces ...................182
Snow chains .................................. 343
Winter tyres
Limiting the speed (on-board com-
puter) ............................................. 245
M+S tyres ...................................... 342
Wiper blades
Cleaning ......................................... 316
Important safety notes ..................136
Replacing ....................................... 136
Wooden trim (cleaning instruc-
tions) .................................................. 318
Workshop see Qualified specialist workshop 20
Index

Problem Possible causes/consequences and
M Solutions
Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
X Have the cause rectified immediately at a qualified specialist
workshop. The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be lit and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 310). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Manual transmission
Important safety notes
G
WARNING
The movement of the pedals must not be
impaired in any way. Do not keep any objects
in the driver's footwell. Make sure that floor-
mats or carpets are correctly secured and
that there is sufficient clearance for the ped-
als.
Do not place several floormats on top of one
another. G
WARNING
Do not change down for additional engine
braking on a slippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. This could cause you to lose control of your vehicle and cause an
accident.
Gear lever
! Only engage gear when the clutch pedal
is depressed.
! When shifting between 5thand 6thgear,
you should always push the gear lever all
the way to the right. Otherwise, you could
shift unintentionally into 3rdor4th gear
and damage the transmission.
If you shift down at too high a speed (trans-
mission braking), this can cause the engine
to overrev, leading to engine damage.
Do not use the clutch bite point to keep the
vehicle stationary on uphill gradients.
There is otherwise a risk of damaging the
clutch. 166
Manual transmissionDriving and parking

Monitoring range
G
WARNING
Active Blind Spot Assist monitors certain
areas in the immediate vicinity of yourv ehicle.
Vehicles that approach and drive past at high
speeds are not detected. No visual nor audi-
ble warnings are emitted and the system does
not brake the vehicle to correct your course.
If the lanes are very wide, it may not be pos-
sible to monitor the complete width of the
neighbouring lane. For this reason, vehicles in
the nextl ane may no tbe detected, especially
if they are driving in a staggered formation.
This may be the case if vehicles are driving at
the edge of their lane that is furthest away
from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. Example: Coupé
Active Blind Spot Assist monitors the area up
to 3.0 m behind your vehicle and directly next
to your vehicle, as shown in the diagram. For
this purpose, Active Blind Spot Assist uses
radar sensors in the rear bumper.
If the lanes are narrow, vehicles driving in the
lane beyond the lane nextt o your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may be the case if there are vehicles at the inner
edge of your lane.
Due to the nature of the system:
R
warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for a prolonged time.
The Active Blind Spot Assist radar sensors are
integrated into the front and rear bumpers
and behind a cover in the radiator grille. Make
sure that the bumpers and the cover in the
radiator grille are free of dirt, ice or slush. The
rear sensors must not be covered, e.g. by
bicycle racks or overhanging loads. Following
a severe impact or in the event of damage to
the bumpers, have the function of the radar
sensors checked at a qualified specialist
workshop. Active Blind Spot Assist may oth-
erwise no longer work properly.
Indicator and warning display G
WARNING
Active Blind Spot Assist is not active at speeds
below 30 km/h. The indicator lamps in the
exterior mirrors are yellow .Vehicles in the
monitoring range are then not indicated.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time and cause an acci-
dent and injure yourself and others. :
Yellow indicator lamp/red warning lamp Driving systems
215Driving and parking Z

Display messages Possible causes/consequences and
M Solutions
J
Check brake fluid
level There is insufficien
tbrake fluid in the brake flui dreservoir.
In addition, the red Jwarning lamp lights up in the instrument
cluster and a warning tone sounds.
G WARNING
The braking efficiency may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions .Donot continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 177).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the error. #
Check brake pad
wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. PRE-SAFE
inoperative See
Owner's Manual Important functions of PRE-SAFE
®
have failed. All other occupant
safety systems, e.g. airbags, remain available.
X Visit a qualified specialist workshop immediately. PRE-SAFE
Functions cur‐
rently limited See
Owner's Manual PRE-SAFE
®
Brake is temporarily inoperative. Possible causes:
R the function is impaired due to heavy rain or snow.
R the sensors in the radiator trim and in the bumpers are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Once the causes listed above no longer apply, the display message
goes out.
PRE-SAFE ®
Brake is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 177).
X Clean the sensors in the radiator trim and in the bumpers
(Y page 317).
X Restart the engine. Display messages
253On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
?
Coolant Stop vehi‐
cle Switch engine
off The coolan
tis too hot.
Aw arning tone also sounds.
G WARNING
Never drive with an overheated engine. Driving when your engine
is overheated can cause som efluids which may have leaked into
the engine compartment to catch fire.
Steam fro manoverheated engine can cause serious burns, which
can occur just by opening the bonnet.
This poses a risk of injury.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 177).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Do not start the engine again until the display message goes out
and the coolant temperature is under 120 †. The engine may
otherwise be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visi taqualified specialist
workshop immediately.
The reading may rise up to 120 †undernormal driving conditions
if the coolant has been filled correctly. 260
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
DISTRONIC PLUS cur‐
rently unavailable
See Owner's Manual DISTRONIC PLU
Sis temporarily inoperative. Possible causes:
R the function is impaired due to heavy rain or snow.
R the sensors in the radiator trim and in the bumpers are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Aw arning tone also sounds.
Once the causes listed abov eno longer apply, the display message
goes out.
DISTRONIC is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 177).
X Clean the sensors in the radiator trim and in the bumpers
(Y page 317).
X Restart the engine. DISTRONIC PLUS
inoperative DISTRONIC PLUS is faulty.
BAS PLUS and PRE-SAFE
®
Brake may also have failed.
Aw arning tone also sounds.
X Visi taqualified specialist workshop. DISTRONIC PLUS
inactive You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal. DISTRONIC PLUS
--- km/h An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation conditions for DISTRONIC PLUS
(Y page 188). DISTRONIC PLUS and
SPEEDTRONIC DISTRONIC PLUS and SPEEDTRONIC are faulty. A warning tone
also sounds.
X Visit a qualified specialist workshop. Cruise control and
SPEEDTRONIC inop‐
erative SPEEDTRONIC and cruise control are malfunctioning.
Aw arning tone also sounds.
X Visi taqualified specialist workshop. Display messages
267On-board computer and displays Z