2012 MERCEDES-BENZ R-Class ECU

GWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system, or with access to an
unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. The children
could:
R injure themselves on parts of the vehicle
R be seriously or fatally injured through
excessive exposure to extreme heat or cold
R injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
ignition lock or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
GWARNING
Do not carry heavy or hard objects in the
passenger compartment or trunk unless they
are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident
Special seat belt retractor
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor.
When activated, the special seat belt
retractor ensures the seat belt will not
slacken once the child restraint system has
been secured.
Installing a child restraint system:XAlways comply with the manufacturer's
installation instructions.XPull the seat belt smoothly from the inertia
reel.XEngage the seat belt tongue in the belt
buckle.
Activating the special seat belt retractor:
XPull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat
belt retractor is enabled.XPush down on the child restraint system to
take up any slack.
Removing a child restraint system/
deactivating the special seat belt retractor:
XAlways comply with the manufacturer's
installation instructions.XPress the seat belt release button and
guide the belt tongue to the belt outlet.
The special seat belt retractor is
deactivated.GWARNING
Never release the seat belt buckle while the
vehicle is in motion, since the special seat belt
retractor will be deactivated.
LATCH-type (ISOFIX) child seat anchors
in the rear
GWARNING
Children that are too large for a child restraint
must travel in seats using normal seat belts.
Position shoulder belt across the chest and
shoulder, not face or neck.
In order to attain the correct seating position
for children weighing over 41 lb (18 kg), it may
be necessary to use a booster seat until they
reach a height where a normal lap/shoulder
58Children in the vehicleSafety

seat belt lies properly across their bodies
without the need for a booster seat.
Install the child restraint system according to
the manufacturer's instructions.
The child restraint system must be installed
firmly on both brackets.
An incorrectly installed child restraint system
can come loose in the event of an accident,
causing the child to be severely or fatally
injured.
Child restraint systems/child restraint
retaining brackets that are damaged or have
suffered damage due to an impact must be
replaced.
LATCH-type (ISOFIX) is a standardized
securing system for specially designed child
restraint systems on the rear seats.
Securing rings for two LATCH-type (ISOFIX)
child restraint systems are installed on the
left and right:
R on the seat cushions of the outer seats in
the second row
R on the backrests of the seats in the third
row of seats
Secure non LATCH-type (ISOFIX) child
restraint systems using the vehicle's seat belt
system. Always install child restraint systems
according to the manufacturer's instructions.XMove the rear seat backrests in the second
row to an upright position ( Y page 101).
The securing rings on the outer seats in the
second row of seats are covered by an
upholstered lining.
:Securing rings for outer seats in the
second row;Installation instructions for the securing
ringXSlide the upholstered lining to the side.XInstall the LATCH-type (ISOFIX) child
restraint system. Comply with the
manufacturer's instructions when doing
so.
The securing rings on the seats in the third
row are covered by protective caps.
XRemove protective caps = in the third row
of seats.Children in the vehicle59SafetyZ

?Securing rings for the third row of seatsXInstall the LATCH-type (ISOFIX) child
restraint system. Comply with the
manufacturer's instructions when
installing the LATCH-type (ISOFIX) child
restraint system.
Top Tether
Top Tether anchorages
GWARNING
Observe "Important safety notes"
( Y page 56).
Top Tether provides an additional connection
between a child restraint system, secured
with a LATCH-type (ISOFIX) child seat mount,
and the rear seat. It helps reduce the risk of
injury even further.
The Top Tether anchorages are:
R in the 2nd row of seats on the rear of the
backrests of the outer seats and on the
vehicle floor behind the center seat
R in the 3rd row of seats on the rear of the
backrests
Outer seats in the 2nd and 3rd rowXRemove respective covering cap : of the
Top Tether anchorage.XMove the head restraint upwards.XTilt the rear seat backrest forwards
( Y page 253).XRoute Top Tether belt ? under the head
restraint between the two head restraint
bars.XHook Top Tether hook = of Top Tether
belt ? into Top Tether anchorage ;.60Children in the vehicleSafety

Ensure that:
R Top Tether hook = is hooked into Top
Tether anchorage ; as shown
R Top Tether belt ? is not twisted
R Top Tether belt ? is routed between the
seat backrest and the cargo
compartment cover if the cargo
compartment cover is installed.
R Top Tether belt ? is routed between the
seat backrest and the cargo net if the
cargo net is installed.GWARNING
Do not secure the Top Tether hook to the loop
underneath the Top Tether anchorage if you
are securing a child restraint system in the
third row of seats. The child restraint system
is not secured if you do so. An incorrectly
fitted child restraint system cannot perform
its intended protective function in the event
of an accident, and could lead to injuries.
XSwing back the seat backrest until it
engages ( Y page 253).
The outer seats in the second row are only
locked if the lock verification indicator is
folded in and the indicator area is barely
visible ( Y page 253).GWARNING
Make sure that the seats are locked and that
the backrests are locked in a vertical position
after fitting the Top Tether belt.
The outer seats in the second row are only
locked if the lock verification indicator is
folded in and the indicator area is barely
visible.
If the backrests are not locked, they could fold
forwards in the event of an accident, sudden
braking or a sudden change of direction.
Instead of restraining an occupant, they could
cause additional serious or even fatal injury.
XMove the head restraint back down again
slightly if necessary ( Y page 100). Makesure that you do not interfere with the
correct routing of Top Tether belt ?.XInstall the LATCH-type (ISOFIX) child
restraint system with Top TetherComply
with the manufacturer's installation
instructions when doing so. Make sure that
Top Tether belt ? is tight.
Center seat in the 2nd row
GWARNING
Only secure a child restraint system on the
center seat in the second row when the belt
buckles of the outer seats are not obstructed
or overlapped by the child restraint system.
Not all child restraint systems, including some
Mercedes-Benz approved child restraint
systems, can be used in this seat position. For
further information contact an authorized
Mercedes-Benz Center.
Do not use the LATCH-type anchors (ISOFIX)
or seat belt buckles for the outer seats in
conjunction with a child seat in the second-
row center seat. Child seats in the center
seating position must only be secured by the
center seat position seat belt inserted into the
seat belt buckle for the second-row center
seat.
GWARNING
Please be aware that installation of a child
seat in the second-row center seat position
can prevent the folding forward of the outer
second-row seats which can obstruct access
to and exit from the third-row seats. This
could affect the occupants' on the third-row
seats ability to exit the vehicle. In case of an
accident it will be difficult for occupants of the
third-row seats to leave the vehicle. Serious
injuries could be the result.
Install a child seat in one of the outer seating
positions according to the installation
instructions if access to the third-row seats is
required.
XMove the head restraint upwards.Children in the vehicle61SafetyZ

XPull release loop : in the direction of the
arrow.XFold seat backrest ; forward in the
direction of seat cushion = until Top
Tether anchorage ? is accessible.XRoute Top Tether belt B under the head
restraint between the two head restraint
bars.XHook Top Tether hook A of Top Tether belt
B into Top Tether anchorage ?.Ensure that:
R Top Tether hook A is hooked into Top
Tether anchorage ? as shown
R Top Tether belt B is not twisted
R Top Tether belt B is routed between the
seat backrest and the cargo
compartment cover if the cargo
compartment cover is installed.
R Top Tether belt B is routed between the
seat backrest and the cargo net if the
cargo net is installed.XSwing back the seat backrest until it
engages audibly ( Y page 253).GWARNING
Always lock the rear seat backrests in their
upright position when the rear seats are
occupied by passengers. Lock the rear seat
backrests in their upright position after
installing the TopTether straps or when the
extended cargo compartment is not in use.
Make sure that rear seat backrests are
secured properly by pushing and pulling on
the seat backrests. If the seat backrest is not
locked properly, the seat backrest could fold.
The child restraint system is no longer
supported properly or held in position and can
no longer fulfill its function. That could cause
serious or even fatal injuries.
XMove the head restraint back down again
slightly if necessary ( Y page 100). Make
sure that you do not interfere with the
correct routing of Top Tether belt B.XInstall the LATCH-type (ISOFIX) child
restraint system with Top Tether. Comply
with the manufacturer's installation
instructions when doing so. Make sure that
Top Tether belt B sits taut.62Children in the vehicleSafety

Child-proof locks
Important safety notesGWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system, or with access to an
unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. The children
could:
R injure themselves on parts of the vehicle
R be seriously or fatally injured through
excessive exposure to extreme heat or cold
R injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
ignition lock or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
Child-proof locks for the rear doors
GWARNING
Children could open a rear door from inside
the vehicle. This could result in serious
injuries or an accident. Therefore, when
children ride in the rear always secure the rear
doors with the child-proof locks.
You secure each door individually with the
child-proof locks on the rear doors. A door
secured with a child-proof lock cannot be
opened from inside the vehicle. When the
vehicle is unlocked, the door can be opened
from the outside.XTo activate: press the child-proof lock
lever down in the direction of arrow ;.XMake sure that the child-proof locks are
working properly.XTo deactivate: press the child-proof lock
lever up in the direction of arrow :.
Override feature for the rear side
windows
GWARNING
When children ride on the vehicle's rear seats,
activate the override switch. Otherwise, the
children could be injured, e.g. by trapping
themselves in the rear side window.
XTo activate/deactivate: press switch :.
Switch : is pushed in or extended. If the
switch has engaged, operation of the rear
side windows is deactivated. Operation is
then only possible using the switches in the
driver's door.Children in the vehicle63SafetyZ

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 24).
SmartKey
Important safety notes
GWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.GWARNING
If a key ring is too heavy or too large, the
weight acting on the key could cause it to turn
in the ignition lock or catch on the steering
wheel. This could cause the engine to be
switched off suddenly. You could lose control
of the vehicle and cause an accident. Do not
attach any heavy or large key rings to the key
that is inserted in the ignition.
General information
If you cannot lock or unlock the vehicle with
the SmartKey, either the battery in the
SmartKey is discharged, the SmartKey is
faulty or the starter battery is discharged.
XCheck the battery in the SmartKey and
replace it if necessary ( Y page 76).XUnlock the driver's door using the
mechanical key ( Y page 81).XLock the vehicle ( Y page 81).XHave the starter battery and battery
contacts checked at an authorized
Mercedes-Benz Center.
If the SmartKey is faulty, contact Roadside
Assistance or an authorized Mercedes-Benz
Center.
SmartKey functions
General notes
i USA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
72SmartKeyOpening/closing

ProblemPossible causes/consequences and M SolutionsYou 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
( Y page 310).
or
XJump-start the vehicle ( Y page 313).
or
XConsult a qualified specialist workshop.The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.A door is open. Therefore, the SmartKey cannot be detected as
easily.XClose the door 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
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.GWARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Doors79Opening/closingZ