Page 34 of 421

31 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index KEYLESS-GO-card
The KEYLESS-GO-card (1) does not have a removable 
mechanical key.
The functions of the KEYLESS-GO-card (1) are identical 
to those of the electronic main key. Carrying the card 
with you permits the use of the vehicle.The validity of the KEYLESS-GO-card is checked every 
time when grasping a door handle or pushing the trunk 
lid release. Once the KEYLESS-GO-card is recognized 
outside the vehicle, the doors, trunk lid and fuel filler 
flap are unlocked, depending on the selected mode 
(global or selective unlocking mode, see page 43).
Starter switch KEYLESS-GO, see page 228.
Starting and turning off the engine with KEYLESS-GO, 
see page 231 and page 232.
Note:
In the case of a malfunction in the KEYLESS-GO-system, 
we recommend that you carry the electronic key plus 
mechanical key with you and keep them in a safe place 
so that they are always handy. Never leave the electronic 
key or a KEYLESS-GO-card in the vehicle.
Obtaining replacement keys
Your vehicle is equipped with a theft deterrent locking 
system requiring a special key manufacturing process. 
For security reasons, replacement keys can only be 
obtained from your authorized Mercedes-Benz Center.
P80.30-2029-26
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        Page 64 of 421
61 Central locking system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Trunk lid emergency release
The emergency release button (1) is located in the trunk 
lid.
Briefly press emergency release button (1).
All doors, the fuel filler flap, and the trunk unlock; and 
the trunk lid opens.Note:
The emergency release button (1) only unlocks and 
opens the trunk while the vehicle is standing.
Important!
The emergency trunk lid release button (1) does not 
open the trunk lid, if:
•the vehicle battery is discharged or disconnected,
•the trunk lid was previously locked separately with 
the mechanical key, see page 53.
Illumination of the emergency release button (1):
The button will blink for 30 minutes after opening the 
trunk.
The button will blink for 60 minutes after closing the 
trunk.
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        Page 410 of 421

407 Index
Te ch n ica l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car careIndex Exterior rear view mirrors
Electrically folding  .................................................... 109
Parking position ........................................................ 108
FFirst aid kit  .....................................................................328
Flexible service system (FSS)  ...................................... 147
Footwell lighting  ............................................................ 189
Front airbags  .................................................................... 94
Front center console storage
compartment ventilation  ......................................... 175
Front seat adjustment  ..................................................... 67
Fuel
Gasoline additives  ....................................................398
Premium unleaded gasoline  ................. 291, 395, 397
Fuel cap placement warning
See CHECK ENGINE
malfunction indicator lamp ................................296
Fuel filler flap, manual release  ...................................368
Fuel requirements  .........................................................397
Fuel reserve warning  ....................................................299
Fuels, coolants, lubricants etc. - capacities  ...............394
Fuses, electrical  .............................................................329
GGarage door opener  ...................................................... 206
Gasoline
Additives .................................................................... 398
Fuel requirements  ................................................... 397
Premium unleaded  .................................................. 397
General notes on the 
central locking system  ............................................... 33
Glove box  ......................................................................... 194HHazard warning flasher switch  ................................... 163
Head restraints, front seats
Removal and installation  ...........................................72
Head restraints, rear seat  ............................................... 80
Power head restraints ................................................. 81
Headlamp cleaning system  ........................................... 159
Headlamp mode (HEADLAMPS)  .................................. 157
Headlights ....................................................................... 156
Heated seats  ......................................................................75
Hood .................................................................................331
HOOD -
malfunction and warning messages  ..................... 320