2015 MERCEDES-BENZ E-Class SEDAN Owner's Manual

SmartKey battery
Checking the battery X
Press the 0037or0036 button.
The battery is working properly if battery
check lamp 0043lights up briefly.
The battery is discharged if battery check
lamp 0043does not light up briefly.
X Change the battery (Y page 87).
i If the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the 0037or0036 button:
R locks or
R unlocks the vehicle
i You can get a battery at any qualified spe-
cialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the Smart-
Key (Y page 86). X
Press mechanical key 0044into the opening
in the SmartKey in the direction of the
arrow until battery compartment cover 0043
opens. Do not hold battery compartment
cover 0043closed while doing so.
X Remove battery compartment cover 0043. X
Repeatedly tap the SmartKey against your
palm until battery 0087falls out.
X Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X Make sure that the surface of the battery is
free of lint, grease and other contaminants.
X Insert the front tabs of battery compart-
ment cover 0043into the housing and then
press to close it.
X Insert mechanical key 0044into the Smart-
Key.
X Check the function of all SmartKey buttons
on the vehicle. SmartKey
87Opening and closing Z

Problems with the SmartKey
Problem
Possible causes/consequences and
0050
0050Solutions You can no longer lock
or unlock the vehicle
using the SmartKey. The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 87) and replace it if nec-
essary (Y page 87).
If this does not work:
X Unlock (Y page 91) or lock (Y page 91) the vehicle using the
mechanical key. The SmartKey is faulty.
X Unlock (Y page 91) or lock (Y page 91) the vehicle using the
mechanical key.
X Have the SmartKey checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 87) and replace it if nec-
essary (Y page 87).
If this does not work:
X Unlock (Y page 91) or lock (Y page 91) the vehicle using the
mechanical key. There is interference from a powerful source of radio waves.
X Unlock (Y page 91) or lock (Y page 91) the vehicle using the
mechanical key. KEYLESS-GO is malfunctioning.
X Lock/unlock the vehicle using the remote control function of
the SmartKey.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
X Unlock (Y page 91) or lock (Y page 91) the vehicle using the
mechanical key.
X Have the vehicle and SmartKey checked at a qualified specialist
workshop. You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 88
SmartKeyOpening and closing

Problem
Possible causes/consequences and
0050
0050Solutions You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the
SmartKey. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 352).
or
X Jump-start the vehicle (Y page 353).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. There is interference from a powerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle, they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the vehicle. Always keep the SmartKey out of
reach of children.
Ideally, place luggage or loads in the trunk/
cargo compartment. Observe the loading
guidelines (Y page 292). Unlocking and opening doors from
the inside
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 68). Doors
89Opening and closing Z

X
To unlock a front door: pull door han-
dle 0044.
Locking knob 0043pops up.
The door is unlocked and can be opened.
X To open a front door: pull door handle0044.
X To unlock a rear door: pull up locking
knob 0043.
The door is unlocked and can be opened.
X To open a rear door: pull door handle0044. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. X
To unlock: press button 0043.
X To lock: press button 0044.
If all the doors are closed, the vehicle locks.
Meanwhile, the fuel filler flap will not be
locked or unlocked. You cannot unlock the vehicle centrally from
the inside if the vehicle has been locked with the SmartKey or KEYLESS-GO.
You can open a door from inside the vehicle
even if it has been locked.
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 68).
If a locked door is opened from the inside, the
previous unlock status of the vehicle will be
taken into consideration if:
R the vehicle was locked using the locking
button for the central locking, or
R if the vehicle was locked automatically
The vehicle will be fully unlocked if it had pre- viously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside
is unlocked. Automatic locking feature
X
To deactivate: press and hold button 0043
for about five seconds until a tone sounds.
X To activate: press and hold button 0044for
about five seconds until a tone sounds.
i If you press one of the two buttons and do
not hear a tone, the relevant setting has
already been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning. 90
DoorsOpening and closing

You could therefore lock yourself out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on a roller dynamometer.
You can also switch the automatic locking
function on and off using the on-board com-
puter (Y page 246). Unlocking the driver's door (mechan-
ical key)
If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
X Take the mechanical key out of the Smart-
Key (Y page 86).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key counter-clockwise
to position 0047.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the Smart-
Key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y page 81).Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key. X
Open the driver's door.
X Close the front-passenger door, the rear
doors and the trunk lid/tailgate.
X Press the locking button (Y page 90).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs by hand, if necessary.
X Close the driver's door.
X Take the mechanical key out of the Smart-
Key (Y page 86).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key clockwise as far as
it will go to position 0047.
X Turn the mechanical key clockwise to posi-
tion 0047.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the trunk lid/
tailgate are locked.
X Insert the mechanical key into the Smart-
Key. Trunk/cargo compartment
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid/tailgate is open when the engine is Trunk/cargo compartment
91Opening and closing
Z

running, especially if the vehicle is in motion.
There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid/tailgate. Never drive with the
trunk lid/tailgate open.
! The trunk lid/tailgate swings upwards
and to the rear when opened. Therefore,
make sure that there is sufficient clearance
above and behind the trunk lid/tailgate.
Ideally, place luggage or loads in the trunk/
cargo compartment. Observe the loading
guidelines (Y page 292).
Do not leave the SmartKey in the trunk/cargo
compartment. You could otherwise lock your-
self out.
Sedan without trunk lid remote closing
feature: the trunk lid can be:
R opened and closed manually from outside
R opened automatically from outside
R opened automatically from inside
R locked separately
R opened with the emergency release button
R unlocked with the mechanical key
Sedan with trunk lid remote closing fea-
ture: the trunk lid can be:
R opened and closed manually from outside
R opened/closed automatically from outside
R opened/closed automatically from inside
R locked separately
R opened with the emergency release button
R unlocked with the mechanical key
Wagon: you can:
R open and close the tailgate manually from
outside
R open the tailgate manually from inside
(Wagon with a folding bench seat)
R open and close the tailgate automatically
from outside
R open and close the tailgate automatically
from inside R
limit the opening angle of the tailgate
R unlock the tailgate using the mechanical
key Trunk lid/tailgate reversing feature
The trunk lid/tailgate is equipped with an
automatic reversing feature. It reacts if a solid object obstructs or restricts the trunk lid/
tailgate during the closing procedure. The
trunk lid/tailgate opens again automatically.
The automatic reversing feature is only an aid
and is not a substitute for your attentiveness
to the trunk lid/tailgate while it is closing. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over the last 1/3 in (8 mm) of the closing
movement
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure.
If somebody becomes trapped:
R press the 0054button on the SmartKey, or
R press the remote operating switch on the
driver’s door, or
R press the closing or locking button on the
trunk lid/tailgate, or
R pull on the handle on the trunk lid/tailgate 92
Trunk/cargo compartmentOpening and closing

Opening/closing from outside
Opening Handle (example: Sedan)
X Press the 0036button on the SmartKey.
X Sedan: pull handle 0043.
X Raise the trunk lid.
Wagon: if you pull handle 0043and keep it in
this position, you can open the tailgate man-
ually. If you release the handle, the tailgate
opens automatically.
Closing Recess (example: Sedan)
X Pull the trunk lid/tailgate down using
recess 0043.
X Wagon: let the tailgate drop and engage in
the lock.
X If necessary, lock the vehicle with the 0037
button on the SmartKey (Y page 84) or with
KEYLESS-GO (Y page 85). i
If a KEYLESS-GO key is detected in the
trunk/cargo compartment, the trunk lid/
tailgate will not lock.
Sedan: the trunk lid then opens again. Opening/closing automatically from
outside
Important safety notes G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid/tailgate is open when the engine is
running, especially if the vehicle is in motion.
There is a risk of poisoning.
Always switch off the engine before opening
the trunk lid/tailgate. Never drive with the
trunk lid/tailgate open.
! The trunk lid/tailgate swings upwards
and to the rear when opened. Therefore,
make sure that there is sufficient clearance
above and behind the trunk lid/tailgate.
Opening You can open the trunk lid/tailgate automat-
ically with the SmartKey or the handle in the
trunk lid/tailgate.
X Press and hold the 0054button on the
SmartKey until the trunk lid/tailgate
opens.
or
X If the trunk lid/tailgate is unlocked, pull the
handle of the trunk lid/tailgate and release it again immediately (Y page 93). Trunk/cargo compartment
93Opening and closing Z

Closing
Closing button and locking button (example:
Sedan)
Sedan: on vehicles with the trunk lid remote
closing feature, you can close the trunk lid
automatically. For vehicles with trunk lid
remote closing feature and KEYLESS-GO: you can simultaneously close the trunk lid and
lock the vehicle.
Wagon: for vehicles with KEYLESS-GO, you
can simultaneously close the tailgate and
lock the vehicle.
X To close: press closing button 0043in the
trunk lid/tailgate.
X To simultaneously close the trunk lid/
tailgate and lock the vehicle:
Press closing button 0044in the trunk lid/
tailgate. The KEYLESS-GO key must be in
the rear detection range of the vehicle.
The trunk lid/tailgate closes.
If all the doors are closed, the vehicle locks.
i If KEYLESS-GO detects a SmartKey in the
trunk/cargo compartment, the trunk lid/
tailgate opens again after it is closed.
If KEYLESS-GO detects a second SmartKey outside the vehicle, the trunk lid/tailgate
remains closed. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle's exhaust system may be very hot. You could burn yourself by touching the
exhaust system if you use HANDS-FREE
ACCESS. There is a risk of injury. Always
ensure that you only make the kicking move-
ment within the detection range of sensors.
! If the SmartKey is within the rear detec-
tion range of KEYLESS-GO, the following
situations, for example, could lead to the
unintentional opening of the trunk lid/tail-
gate:
R using a car wash
R using a power washer
Make sure that the SmartKey is at least
6.5 ft (2 m) away from the vehicle.
General notes Sedan:
with KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the trunk lid
or stop the closing procedure without using
your hands.
Wagon: with KEYLESS-GO and HANDS-FREE
ACCESS, you can open or close the tailgate or
stop the procedure without using your hands.
This is useful if you have your hands full. To do this, make a kicking movement under the
bumper with your foot.
Observe the following points:
R Carry your KEYLESS-GO key about your
person. The KEYLESS-GO key must be in
the rear detection range of the vehicle.
R When making the kicking movement, make
sure that you are standing firmly on the
ground and that there is sufficient clear-
ance to the rear of the vehicle. You could
otherwise lose your balance e.g. on ice. 94
Trunk/cargo compartmentOpening and closing