2010 MERCEDES-BENZ R320 ECU

Display messages
Possible causes/consequences and
X SolutionsFront
Passenger
Airbag
Enabled
See
Operator’s
Manual USA only:
The front passenger front air bag is activated while driving
even though a child, small individual, or object below the
system’s weight threshold is on the front passenger seat, or
the front passenger seat is empty. Objects on the seat or
forces acting on the seat may make the system sense
supplemental weight.
X
Stop the vehicle in a safe location as soon as possible.
X Engage the parking brake.
X Switch off the ignition.
X Open the front passenger door.
X Remove child and child restraint from front passenger seat
and properly secure the child in rear seat employing the
child restraint if necessary.
X Remove any other items from on and around the front
passenger seat and make sure the parcel net on the back
of the front passenger seat is empty.
X Make sure no objects which apply forces to the seat are
present
(e.g. objects such as books, briefcases etc. lodged
behind or around the seat, head restraints pushing against
roof etc.). The system may recognize such forces as
supplemental weight and sense that an occupant on the
front passenger seat is of a greater weight than actually
present.
X Keep the seat unoccupied, close the front passenger door
and switch on the ignition.
Monitor the 42 indicator lamp in the center
console (Y page 44) and the multifunction display in the
instrument cluster

(Y page 28) for the following:
With the seat unoccupied and the ignition switched on,
R the 42 indicator lamp in the center console
should illuminate and remain illuminated, indicating that
the OCS (Y page 42) has deactivated the front passenger
front air bag.
R the message Front Passenger Airbag Enabled See
Operator’s Manual or the message Front Passenger
Airbag Disabled See Operator’s Manual should not
appear in the multifunction display at any time the seat is
unoccupied. Wait at least 60 seconds for the system to
complete the necessary check cycles and to make sure
neither message appears in the multifunction display. Vehicle status messages in the multifunction display
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Installing wiper blades
Front wiper blades X
With guide tab = sliding into opening ?,
place wiper blade : onto wiper arm in
direction of arrow.
X Fold wiper blade : towards wiper arm.
Tabs ; (Y page 318) must engage into
both recesses of attachment ;.
X Check whether the wiper blade is securely
fastened.
X Fold the wiper arm backward to rest on the
windshield.
Make sure you hold on to the wiper arm
when folding it back.
! Make sure the wiper blades are installed
properly. Improperly installed wiper blades
may cause windshield damage.
Rear wiper blade X
Insert wiper blade ; into wiper arm :.
X Hold wiper arm : and engage wiper
blade ; by pushing it in direction of arrow
until it locks into place.
X Check whether the wiper blade is securely
fastened.
X Fold wiper arm : to rest on the rear
window.
Make sure to hold on to the wiper when
folding the wiper arm back.
! Make sure the wiper blade is installed
properly. An improperly installed wiper
blade may cause rear window damage. Flat tire
Safety notes
Your vehicle may be equipped with an
MOExtended system or a spare wheel with
collapsible tire. Vehicles with an MOExtended
system do not have a spare wheel or a TIREFIT
kit.
For information on your vehicle’s equipment,
see “Rims and tires” ( Y page 347). G
Warning!
The dimensions of the spare wheel are
different from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a spare wheel
mounted. Adapt your driving style
accordingly.
The spare wheel is for temporary use only.
When driving with a spare wheel mounted,
ensure proper tire inflation pressure and do
not exceed a vehicle speed of 50 mph
(80 km/h).
Contact the nearest authorized Mercedes-
Benz Center as soon as possible to have the
spare wheel replaced with a regular road
wheel.
Never operate the vehicle with more than one
spare wheel mounted. Flat tire
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battery cover is non-removable. Do not
attempt to open the battery as otherwise
the battery will be damaged.
VRLA
batteries do not require topping-up of
the electrolyte level. They cannot be
opened to check the electrolyte level.
However, the battery condition must be
checked periodically by performing a
battery conductance test. Refer to
Maintenance Booklet for battery condition
testing intervals.
The factory-equipped battery may only be
replaced with a battery that
R has the same security features
R is of identical size
R is of identical voltage
R is of identical capacity
! As any other battery, the battery may
discharge if you do not operate the vehicle
for an extended period of time. Have the
battery disconnected at a qualified
workshop or an authorized Mercedes-Benz
Center in such a case. You may also
connect an accessory battery charge unit
expressly approved by Mercedes-Benz for
your vehicle model to maintain the battery
charge. Contact an authorized Mercedes-
Benz Center for further information.
The battery, the battery ventilation hose
and the lateral plug must always be
securely installed when the vehicle is in
operation.
! Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch or
KEYLESS-GO button is in position 1.
Otherwise the alternator and other
electronic components could be severely
damaged.
Have the battery checked regularly at an
authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for
maintenance intervals or contact an authorized Mercedes-Benz Center for
further information.
i After battery power was interrupted, do
the following:
R Set the clock
(Y page 133).
Vehicles with COMAND system with
navigation module: Time and date are set
automatically.
R Synchronize the door windows
(Y page 107).
R Synchronize the power tilt/sliding
sunroof (Y page 183).
R Synchronize the power tilt/sliding panel
(Y page 186).
R Synchronize the exterior rear view
mirrors (Y page 96). Charging the battery
G
Warning!
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit approved by Mercedes-Benz is
being used. Gases may escape during
charging and could cause an explosion that
may

result in personal injury, paint damage or
corrosion.
An accessory battery charge unit specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available. It permits the charging of the
battery in its installed position. Contact an
authorized Mercedes-Benz Center for
information and availability.
Charge battery in accordance with the
separate instructions for the accessory
battery charger.
Have the battery charged at an authorized
Mercedes-Benz Center. If you charge the
battery yourself, follow the operating
instructions for your charging device. Battery
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Towing with all wheels on the ground
G
Warning!
If circumstances require towing the vehicle
with all wheels on the ground, always tow with
a tow bar if:
R the engine will not run
R there is a malfunction in the brake system
R there is a malfunction in the power supply
or in the vehicle’s electrical system
This is necessary to adequately control the
towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make sure the SmartKey is in
starter switch position 2.G
Warning!
With the engine not running, there is no power
assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle. Adapt your driving accordingly.
X Make sure the ignition is switched on.
X With the vehicle at a standstill, depress the
brake pedal and keep it pressed.
X Shift the automatic transmission into
neutral position N.
X Release the brake pedal.
X If engaged, release the parking brake.
X Switch on the hazard warning flasher
(Y page 101).
! Keep in mind that it is important to have
the ignition switched on. Removing the
SmartKey from the starter switch or
opening a front door with the ignition
switched off will automatically shift the
automatic transmission into park position
P.
! The vehicle may be towed only for
distances up to 30 miles (50 km) and at a
speed not to exceed 30 mph (50 km/h). i
While being towed with the hazard
warning

flasher in use, use the combination
switch in the usual manner to signal turns.
Only the selected turn signal will operate.
Upon canceling the turn signal, the hazard
warning flasher will operate again. Stranded vehicle
Freeing a stranded vehicle, on which the
wheels are dug into sand or mud, should be
done with the greatest of care, especially if
the vehicle is heavily loaded.
Note the following when freeing a stranded
vehicle:
R Avoid pulling the vehicle abruptly or
diagonally, since it could result in damage
to the chassis alignment.
R Never try to free a vehicle that is still
coupled to a trailer.
R If

possible, a vehicle equipped with a trailer
hitch receiver should be pulled backward in
its own previously made tracks. Fuses
Introduction
The electrical fuses in your vehicle serve to
switch off malfunctioning power circuits.
If a fuse is blown, the components and
systems secured by that fuse will stop
operating. G
Warning!
Only use fuses approved by Mercedes-Benz
with
the specified amperage for the system in
question and do not attempt to repair or
bridge a blown fuse. Using other than
approved fuses or using repaired or bridged
fuses may cause an overload leading to a fire,
and/or cause damage to electrical
components and/or systems. Have the cause
determined and remedied by an authorized
Mercedes-Benz Center. 340
Fuses
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X
Closing: Make sure the sealing rubber is
positioned properly.
X Insert the tabs of fuse box cover ; that are
opposite of clamp : into the openings.
X Press fuse box cover ; down
X Close clamp :.
! The fuse box cover must be properly
positioned as described. Otherwise,
moisture or dirt could enter the fuse box
and possibly impair fuse operation.
X Close the hood after checking or replacing
fuses. Fuse box in cargo compartment
X
Opening: Open the cargo compartment.
X Lift the cargo compartment floor
(Y page 270).
X Secure cargo compartment floor with
securing hook (Y page 270).
X Fold cover : to the left as indicated by the
arrow.
X Closing: Install everything in reverse order. Emergency engine shutdown
If the engine cannot be turned off as
described ( Y page 114), you may use the
following emergency procedure. X
Take the fuse chart from the vehicle tool kit
(Y page 270).
X Open the fuse box in engine compartment.
X Remove fuse 120.
Find its location in the fuse chart. 342
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