
Important safety notes
iObserve the "Important safety notes" sec-
tion (
Ypage 75).
No steering support isprovided by STEER
CONTROL, if:
RESP®is malfunctioning.
Rthe lighting isfaulty.
Power steering will, however, continue to
function.
Protection against theft
Immobilizer
The immobili zer prevents your vehicle from
bein g started without the correct SmartKey.
XTo activate with the SmartKey: remove
the SmartKey from the ignition lock.
XTo activate with KEYLESS-GO: switch the
ignit ion off and open the driver's door.
XTo deactivate: switch on the ignition.
When leaving the vehicle, always take the
Sm artKey with you and lock the vehicle. Any-
one can start the engine ifa valid SmartKey
has been left inside the vehicle.
iThe immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be star-
ted (yet the vehicle's battery is charged),
the system isnot operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FOR-M ERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
XTo ar m:lock the vehicle with the SmartKey
or KEYLESS -GO.
In dicator lamp :flashes. The alarm sys-
tem isarmed after approximately
15 seconds.
XTo disar m:unlock the vehicle with the
Sm artKey or KEYLESS -GO.
or
XIn sert the SmartKey into the ignit ion lock.
A visual and audiblealarmistriggered ifthe
alarm system isarmed and you open:
Ra door
Rthe vehicle with the mechanical key
Rthe trunk lid/tailgate
Rthe hood
XTo switch the ala rmoff with the Smar t-
Key: press the %or& button on the
Sm artKey.
The alarm isswitched off.
or
XRemo vethe Start /S top button from the
ignit ion lock.
XInsert the SmartKey into the ignit ion lock.
The alarm isswitched off.
Protection against theft87
Safety
Z

signal can be activated and deactivated using
the on-board computer (
Ypage 190).
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (
Ypage 190).
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a KEY-
LESS-GO key in the vehicle.
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry
the SmartKey with you. You can combine the functions of KEYLESS-GO with those of a con-
ventional SmartKey. Unlock the vehicle by
using KEYLESS-GO, for instance, and lock it
using the &button on the SmartKey.
When locking or unlocking with KEYLESS-GO,
the distance between the SmartKey and the
corresponding door handle must not be
greater than 3 ft (1 m).
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example:
Rwhen the external door handles are
touched
Rwhen starting the engine
Rwhile the vehicle is in motion
XTo unlock the vehicle: touch the inner
surface of the door handle.
XTo lock the vehicle: touch sensor sur-
face :.
XConvenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
For further information on the convenience
closing feature, see the Digital Operator's
Manual, keyword "Convenience closing".
(Example: Sedan)
XTo unlock the trunk lid/tailgate: pull the
handle on the trunk lid/tailgate.
The vehicle only unlocks the trunk lid/tail-
gate.
Deactivating and activating
If you do not intend to use a key for an exten-
ded period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power,
thereby conserving battery power. For the
purposes of activation/deactivation, the
vehicle must not be nearby.
XTo deactivate: press the&button on
the SmartKey twice in rapid succession.
The battery check lamp of the SmartKey
(
Ypage 93) flashes twice briefly and
SmartKey91
Opening and closing
Z

ProblemPossible causes/consequences andMSolutions
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
The engine cannot be
started using the
SmartKey.the on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(
Ypage 278).
or
XJump-start the vehicle (Ypage 279).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart 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 (
Ypage 238).
Information in the Digital Operator's
Manual
In the Digital Operator's Manual you will find
information on the following topics:
RUnlocking and opening doors from the
inside
RCentrally locking and unlocking the vehicle
from the inside
RAutomatic locking feature
Doors95
Opening and closing
Z

XInsert the mechanical key into the trunk lid
lock as far as it will go.
XTurn the mechanical key clockwise from
position1to position 2.
XRemove the mechanical key.
XInsert the mechanical key into the Smart-
Key.
Unlocking the trunk (Sedan)
!
The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
If the trunk cannot be unlocked with the
SmartKey or KEYLESS-GO, use the mechani-
cal key.
If you use the mechanical key to unlock and
open the trunk lid, the anti-theft alarm system
will be triggered (
Ypage 87).
XTake the mechanical key out of the Smart-
Key (
Ypage 92).
XInsert the mechanical key into the trunk lid
lock as far as it will go.
XTurn the mechanical key from position 1
counter-clockwise as far as it will go to
position 2.
The trunk is unlocked.
XTurn the mechanical key back to position
1 and remove it.
XInsert the mechanical key into the Smart-
Key.
Trunk emergency release (Sedan)
You can open the trunk lid from inside the
vehicle with the emergency release button.
XPress emergency release button :briefly.
The trunk lid unlocks and opens.
The trunk lid can be unlocked and opened
with the trunk lid emergency release when
the vehicle is stationary or while driving.
The trunk lid emergency release does not
open the trunk lid if the battery is disconnec- ted or discharged.
Trunk lid emergency release light:
Remergency release button :flashes for
30 minutes after the trunk lid is opened.
Remergency release button :flashes for
60 minutes after the trunk lid is closed.
Tailgate emergency release (Wagon)
General notes
!The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and
behind the tailgate.
iTailgate opening dimensions
(
Ypage 344).
If the tailgate can no longer be opened from
outside the vehicle, use the emergency
release on the inside of the tailgate.
On vehicles with a folding bench seat, you can
use the handle to open the tailgate from
inside the vehicle (
Ypage 97).
Trunk/cargo compartment103
Opening and closing
Z

Notes on 4MATIC vehicles
!
Vehicles with 4MATIC must not be towed
with either the front or the rear axle raised,
as doing so will damage the transmission.
If the vehicle has transmission damage or
damage to the front or rear axle, have it trans- ported on a transporter or trailer.
In the event of damage to the electrical
system
If the battery is defective, the automatic
transmission will be locked in position P. To
shift the automatic transmission to position
N, you must provide power to the vehicle's
electrical system in the same way as when
jump-starting (
Ypage 279).
Have the vehicle transported on a transporter
or trailer.
Tow-starting (emergency engine
starting)
!
Vehicles with automatic transmission
must not be started by tow-starting. This
could otherwise damage the transmission.
iYou can find information on "Jump-start-
ing" under (
Ypage 279).
Fuses
Important safety notes
GWARNING
If you manipulate or bridge a faulty fuse or if
you replace it with a fuse with a higher amper- age, the electric cables could be overloaded.
This could result in a fire. There is a risk of an
accident and injury.
Always replace faulty fuses with the specified
new fuses having the correct amperage.
!Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correct fuse rating for the system concerned. Otherwise, components or sys-
tems could be damaged. The fuses in your vehicle serve to close down
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions stop
operating.
Blown fuses must be replaced with fuses of
the same rating, which you can recognize by
the color and value. The fuse ratings are listed
in the fuse allocation chart.
If a newly inserted fuse also blows, have the
cause traced and rectified at a qualified spe-
cialist workshop, e.g. an authorized
Mercedes-Benz Center.
Before changing a fuse
Pay attention to the important safety notes
(
Ypage 284).
XSecure the vehicle against rolling away
(
Ypage 151).
XSwitch off the engine.
XSwitch off all electrical consumers.
XRemove the SmartKey from the ignition
lock.
or, on vehicles with KEYLESS ‑GO:
XOpen the driver's door.
The on-board electronics now have status
0. This is the same as the SmartKey having
been removed.
The driver’s door can be closed again.
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
RFuse box in the engine compartment on the left-hand side of the vehicle, when viewed
in the direction of travel
RFuse box in the trunk/cargo compartment
on the right-hand side of the vehicle, when
viewed in the direction of travel
The fuse allocation chart is located in the
vehicle tool kit in the stowage compartment
under the trunk/cargo compartment floor
(
Ypage 270).
284Fuses
Roadside Assistance