2018 MERCEDES-BENZ E-CLASS CABRIOLET key battery

Anti-theft protection
Fu nction of the immobilizer
The immobilizer pr events your vehicle from being
st ar ted without the cor rect SmartK ey.
The immobilizer is automatically activated when
th e ignition is switched off and deactivated when
th e ignition is switched on.
When leaving theve hicle, alw aysta ke the Smart‐
Ke ywit hyo u and lock theve hicle. An yone can
st art the engine if a valid SmartK eyhas been left
inside theve hicle.
00CE Intheeve ntthe engine cannot bestar ted
(y et theve hicle ’sstar ter battery is charge d),
th e sy stem is not operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FO R-MERCedes (in the USA) or
1-800-387-0 100 (in Canada).
ATA (anti-theft alarm system)
Fu nction of theATA system
If th eATA system is armed, a visual and audible
alarm is triggered in thefo llowing situations:
RWhen a door is opened
RWhen the trunk lid is opened
RWhen the hood is opened
The ATA sy stem is armed automatically af ter
appr oximately 10seconds:
RAfter locking theve hicle with the SmartK ey.
RAf ter locking theve hicle using KEYLESS-GO.
Indicator lamp 1flashes when theAT A sy stem
is activated.
The ATA sy stem is automatically deactivated:
RAf ter unlocking theve hicle with the Smart‐
Ke y
RAfter pressing thest art/ stop button with the
SmartK eyinthestow age compartment
(
→page 132)
Openin gan d closing 83

00BBToswitch on the po wer supp ly:press but‐
to n1 (USA) or 2(Canada) once.
Yo u can act ivate the windshield wiper, for
ex ample.
The po wer supp lyis switched off again if thefo l‐
lowing conditions are me t:
Ryou open the driver's door.
Ryo upr ess butto n1 (USA) or 2(Canada)
twice.
00BBTo switch on the ignition: press button 1
(USA) or 2(Canada) twice.
The indicator lamps in the instrument clus ter
light up.
The ignition is switched off again if one of the
fo llowing conditions is me t:
RYoudo not start theve hicle within
15 minutes.
The transmission is in position 005D.
or
The electric parking brake is applied.
RYo upr ess butto n1 (USA) or 2(Canada)
once.
St arting theve hicle
Starting theve hicle with thest art/s top but‐
to n
Requ irements:
RThe SmartK eyis located in theve hicle and
th e SmartK eybattery is not dischar ged.
00BBShift the transmission toposition 005Dor005C.
00BBDepress the brake pedal and push button 1
(USA) or 2(Canada) once.
00BBIfth eve hicle does not star t:switch off non-
essential consumers and press button 1
(USA) or 2(Canada) once.
00BBIfth eve hicle still does not start and the
3ODFH WKH .H\ LQ WKH 0DUNHG 6SDFH 6HH
2SHUDWRU
V 0DQXDO display message also
appears in the multifunction display: start
th eve hicle in emer gency operation mode.
Yo u can switchoff the engine while driving by
pressing button 1(USA) or 2(Canada) for
about thre e seconds. Be sure toobser vethe
saf etyno tes under "Driving instructions". St
arting theve hicle in emer gency operation
mode
If th eve hicle does not start and the3ODFH WKH
.H\ LQ WKH 0DUNHG 6SDFH 6HH 2SHUDWRU
V 0DQXDO
display message appears in the multifunction
displa y,yo u can start theve hicle in emer gency
operation mode.
00BBEnsure that mar ked space 2is em pty.
00BBRe mo veSmartK ey1 from theke yring.
00BBLay Smart Key1 in mar ked space 2.
The vehicle will start af ter a short while.
If yo ure mo veSmartK ey1 from mar ked
space 2,the engine starts again. For fur‐
th er vehicle starts, ho wever,SmartK ey1
132
Driving and pa rking

Adaptive Highbeam Assist Inopera‐
tive ...................................................... 442
Air Conditioning Malfunction See
Ope rator's Manual ...............................4 34
Apply Brake toShift from 'P' ............... 432
00ADAT TENTION ASSIST Inoperative ...413
00ADAT TENTION ASSIS T:Take a
Break! .................................................. 413
0049Au toLamp Function Inoperati ve
............................................................. 442
Au xilia ryBattery Malfunction .............. 434
Blind Spot Assist Currently Una vaila‐
ble See Opera tor's Manual .................. 416
Blind Spot Assist Inoperative...............417
Blind Spot Assist NotAv ailable When
To wing a Trailer See Operator's Man‐
ual ........................................................ 417
0027Check Brake Fluid Le vel.............. 405
Check Coolant Le vel See Operator's
Manual ................................................ 421 00B2Check Engine Oil
AtNext Refu‐
eling .................................................... 424
0049Che ckLeft Low Beam (Exam‐
ple) ...................................................... 441
Check Tire Pressure Soon ...................425
0077Che ckTire s ................................. 427
00B2Check Washer Fluid .................... 439
0059 Convertible Top Lo wering ........... 440
0059 Convertible Top Oper
ationPos‐
sible to35 mph................................... 440
00AC

Coolant Too Hot Stop Vehicle
Tu rn Engine Off .................................... 421
Cruise Control Canceled ..................... 420
Cruise Control Inoperati ve.................. 420
0025Cur rently Una vailable See Oper‐
ator's Manual ...................................... 397
00E5Cur rently Una vailable See Oper‐
ator's Manual ...................................... 398
00AFDon't Forget Your Key.................. 43 1Driver'
sDoor Ope n &Transmission
No t in P Risk of Vehicle Rolling Away .. 432
006FExample: Front Left Seat Back‐
re st Not Loc ked .................................. 435
0075Example: Left Side Cur tain Air‐
bag Malfunction Service Required ...... 407
0075Fr ont Left Malfunction Service
Re quired (Example) .............................. 410
Fr ont Passenger Airbag Disabled See
Operator's Manual ...............................4 11
Fr ont Passenger Airbag Enabled See
Operator's Manual ...............................4 12
00B6Fu el Level Low ............................ .424
00B6Gas Cap Loose ............................ 424
0025Inoperative See Operator's
Manual ...................................... ...
....... 396
00E5Inoperative See Operator's
Manual ................................................ 399
007AInoperative See Operator's
Manual ................................................ 400
470
Index

Short messagessee Text message s
Side impact air bag ................................... 38
Side impact pr otection ............................ 176
Side windo ws............................................. 71
Child safetyloc kin there ar
passenger compartment ...................... .55
Closin g .................................................. 71
Closin g (all) ............................................ 71
Closin g using the SmartK ey................... 74
Con venience closing feature ................ .73
Con venience opening ............................ 73
Opening .................................................7 1
Opening (all) .......................................... 71
Opening with the SmartK ey................... 73
Problem .................................................7 5
Size designation (tires) ........................... 368
SmartK ey................................................... 57
Battery .................................................. 59
Energy consump tion .............................. 58
Fe atures ................................................ 57
Ke yring attachment .............................. 59
Mechanical key ...................................... 59
Overvie w.............................................. .57 Pa
nic alarm ........................................... 58
Problem ................................................. 60
Un locking sett ing .
................................. 58
Sma rtphone
see Android Auto
see Apple CarPlay™
see Telephone
Snow chains ............................................ 353
Soc ket (12 V) ............................................ 107
Fr ont center console ............................1 07
Re ar passenger compartment ............ .108
Soft top
Care .................................................... 325
Closing (soft- top switch) ........................ 76
Closing using the SmartK ey................... 74
Opening (soft-top switch) ......................7 6
Opening with the SmartK ey................... 73
Problem .................................................8 2
Re locking .............................................. .78
Soft-top switch .......................................... 76
Software update Impor tant sy stem updates .................. .241
Information .......................................... 240
Pe rforming ...........................................2 41Sound
PRE-SAFE
®Sound ................................. 46
Wheels and tires ..................................3 52
Sound see Burmes ter
®sur round sound sy stem
see Sound settings
Sound settings ......................................... 311
Ad justing the balance/fader ............... .312
Ad jus ting tre
ble, mid-range and bass
settings ................................................ 312
Au tomatic volume adjustment ............ .312
Calls up the sound menu ..................... 312
Information .......................................... 311
Speech dialog sy stem
see Voice Cont rol Sy stem
Speed index (tires) ..................................368
Speedome ter
Digital ..................................................2 04
St andby mode
Ac tivating/deactivating .......................1 53
Fu nction .............................................. 152
St anding lights ......................................... 111
Index487