2007 MERCEDES-BENZ R320CDI wheel

290 Controls in detail
Driving systems
Highway level
Close all doors and the tailgate.
Start the engine (page 54).
The switch is located on the upper part of
the center console.
1Vehicle level control switch
2Indicator lampIf indicator lamp2 is on:
Press switch1 (page 289).
Indicator lamp2 flashes. The vehicle
adjusts to the highway level.
The following message appears in the
multifunction display while the level is
being set:When the highway level is reached, indica-
tor lamp2 goes out and the following
message appears in the multifunction dis-
play:
!Keep in mind that in rough or uneven roads,
adjusting the vehicle to a lower level may cause
the vehicle underbody to come in contact with
the road and result in damage to the vehicle
underbody. Always make sure the vehicle has
sufficient ground clearance before adjusting it
to a lower level.
iThe messages can be cleared by pressing
buttonæ orç on the multifunction steer-
ing wheel.
iThe vehicle level is set to highway level auto-
matically when the vehicle speed is exceeding
25 mph (40 km/h).

298 Controls in detail
Loading
Loading instructions
Load distribution
The gross vehicle weight which is the
weight of the vehicle including fuel, tools,
spare wheel, installed accessories, pas-
sengers, and luggage/cargo must never
exceed the load limit and the Gross Vehicle
Weight Rating (GVWR) for your vehicle as
specified on the placard located on the
driver’s door B-pillar (
page 526). In addi-
tion, the load must be distributed in such a
way so that the weight on each axle never
exceeds the Gross Axle Weight Rating
(GAWR) for the front and rear axle. The
GVWR and GAWR for your vehicle are indi-
cated on the certification label which can
be found on the driver’s door B-pillar
(
page 526).
For more information, see “Tire and Load-
ing Information” (
page 377).
The handling characteristics of a fully
loaded vehicle depend greatly on the load
distribution. It is therefore recommended
to load the vehicle according to the illustra-
tions shown, with the heaviest items being
placed towards the front of the vehicle.
Warning!G
Always fasten items being carried as
securely as possible using cargo tie-down
rings and fastening materials appropriate
for the weight and size of the load.
In an accident, during hard braking or
sudden maneuvers, loose items will be
thrown around inside the vehicle, and can
cause injury to vehicle occupants unless the
items are securely fastened in the vehicle.
To help avoid personal injury during a
collision or sudden maneuver, always use
tie-down rings and, if so equipped, always
use the partition net* when transporting
cargo.
Never drive vehicle with the tailgate open.
Deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in uncon-
sciousness and death.

326 Controls in detail
Useful features
Heated steering wheel*
The steering wheel heating warms up the
leather area of the steering wheel.
The stalk is located on the lower left-hand
side of the steering wheel.
1Switching on
2Switching off
3Indicator lampSwitching on
Switch on the ignition (page 39).
Turn switch at the tip of stalk in the
direction of arrow1.
The steering wheel is heated. Indicator
lamp3 comes on.Switching off
Turn switch at the tip of stalk in the
direction of arrow2.
The heated steering wheel is switched
off. Indicator lamp3 goes out.
For information on the steering wheel, see
“Multifunction steering wheel”
(
page 160).
iThe steering wheel heating is temporarily
suspended while indicator lamp3 remains on
when

the temperature of the vehicle interior is
above 86°F (30°C)

the temperature of the steering wheel is
above 95°F (35°C)
When these conditions do not apply anymore,
steering wheel heating continues.
iIndicator lamp3 flashes or goes out

in case of power surge or undervoltage

in case of a steering wheel heating malfunc-
tion
iThe steering wheel heating switches off
automatically when you remove the SmartKey
from the starter switch or, on vehicles with
KEYLESS-GO*, when you switch off the ignition
(
page 39) and open the driver’s door.

327 Controls in detail
Useful features
Telephone*
Radio transmitters, such as a portable tele-
phone or a citizens band unit, should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
The external antenna must be approved by
Mercedes-Benz. Please contact an autho-
rized Mercedes-Benz Light Truck Center
for information on the installation of an
approved external antenna. Refer to the
radio transmitter operation instructions
regarding use of an external antenna.When the mobile phone is inserted in the
cradle, you can operate the telephone
using the following devices:

mobile phone keypad

COMAND system (see separate operat-
ing instructions)

buttonss andt on the multi-
function steering wheel (
page 160)

Voice Control* (see separate operating
instructions)
Warning!G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system,
possibly resulting in an accident and/or
serious personal injury.
Warning!G
Please do not forget that your primary
responsibility is to drive the vehicle.
A driver’s attention to the road must always
be his/her primary focus when driving. For
your safety and the safety of others, we
recommend that you pull over to a safe loca-
tion and stop before placing or taking a
telephone call.
If you choose to use the telephone
1 while
driving, please use the hands-free device
and only use the telephone when road,
weather and traffic conditions permit. Some
jurisdictions prohibit the driver from using a
mobile telephone while driving a vehicle.
Only operate the COMAND system
1 if road,
weather and traffic conditions permit.
Bear in mind that at a speed of just
30 mph (approximately 50 km/h), your
vehicle is covering a distance of 44 feet
(approximately 14 m) every second.
1Observe all legal requirements.
iVarious mobile phone cradles can be
installed in the front center armrest, see
separate installation instructions for the mobile
phone cradle. These mobile phone cradles can
be obtained from an authorized Mercedes-Benz
Light Truck Center.
The functions and services available to you while
using the mobile phone depend on your service
provider and the type of mobile phone you are
using. See also separate operating manual for
instructions on how to use the mobile phone.

328 Controls in detail
Useful features
Please note that these functions are only
available with Mercedes-Benz approved
mobile phones. Please contact an
authorized Mercedes-Benz Light Truck
Center for information on features avail-
able for your mobile phone of choice.
The cradle is located in the front center
armrest.
Open telephone compartment
(
page 313).
Inserting mobile phone in mobile phone
cradle
Once the mobile phone has been inserted
in the mobile phone cradle, you have to
use the hands-free device to respond
during phone calls.
If applicable, remove the cover for the
external antenna connection from the
back of the mobile phone and store it in
a s a f e p l a c e . B e s u r e t o c o m p l y w i t h t h e
mobile phone’s operating instructions
as well.
Example illustration
1Inserting the mobile phone
2Connector contact
3Mobile phone cradle
Slide the lower end of the mobile phone
into connector contact 2 on
cradle3.
Push the top of the mobile phone in
direction of arrow 1, until the lug on
the mobile phone release button
engages.
The mobile phone is connected to the
network via the external antenna.
The mobile phone is linked to the
hands-free device and the multifunc-
tion steering wheel.
The battery is charged depending on its
charge status and the position of the
SmartKey in the starter switch. The
charge procedure will be indicated in
the mobile phone’s display.
You can place or receive phone calls. You
can control other functions of the mobile
phone via the control system (
page 193)
or COMAND system, see separate operat-
ing instructions.
!Do not try to remove the mobile phone along
with the cradle. You could otherwise damage the
mobile phone cradle.
iWhen you take the SmartKey or SmartKey
with KEYLESS-GO* out of the starter switch, the
mobile phone remains switched on for approx.
10 minutes. If you place or receive a call during
this time, the mobile phone switches off 10 min-
utes after the call has been completed.

330 Controls in detail
Useful features
Tele Aid*
Shortly after the completion of your Tele
Aid acquaintance call, you will receive a
user ID and password. By visiting
www.mbusa.com and selecting “Tele Aid”
(USA only), you will have access to account
information, remote door unlock and
more.The Tele Aid system
(Tele
matic Alarm Identification on
D
emand)
The Tele Aid system consists of three
types of response:

automatic and manual emergency

roadside assistance

information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and cel-
lular and GPS coverage are available.
The speaker volume of a Tele Aid call can
be adjusted by using the volume control on
the COMAND system headunit or on the
multifunction steering wheel. To raise, turn
the rotary volume control on the COMAND
system headunit clockwise or press
buttonæ on the multifunction steering
wheel. To lower, turn the rotary volume
control on the COMAND system headunit
counterclockwise or press buttonç on
the multifunction steering wheel.
To activate, press the SOS button, the
Roadside Assistance button• or
the Information button¡, depend-
ing on the type of response required.
!The initial activation of the Tele Aid system
may only be performed by completing the sub-
scriber agreement and placing an acquaintance
call using the ¡button. Failure to complete
either of these steps will result in a system that
is not activated.
If you have any questions regarding activation,
please call the Response Center at
1-800-756-9018 (in the USA) or
1-888-923-8367 (in Canada).
iThe SOS button is located in the overhead
control panel (
page 332).
The Roadside Assistance button•
(
page 333) and the Information
button¡(
page 334) are located below
the center armrest cover.
!The Tele Aid system utilizes the cellular
network for communication and the GPS (G
lobal
P
ositioning System) satellites for vehicle
location. If either of these signals are unavail-
able, the Tele Aid system may not function and if
this occurs, assistance must be summoned by
other means.

334 Controls in detail
Useful features
The Mercedes-Benz Roadside Assistance
dispatcher will either dispatch a qualified
Mercedes-Benz technician or arrange to
tow your vehicle to the nearest
Mercedes-Benz Light Truck Center. For
services such as labor and/or towing,
charges may apply. Refer to the Roadside
Assistance Manual for more information.
The following is only available in the USA:

Sign and Drive services: Services such
as jump start, a few gallons of fuel or
the replacement of a flat tire with the
vehicle spare tire are obtainable.Information button¡
The Information button¡ is located
below the center armrest cover.
1Information button¡
Open the storage tray (page 313).
Press and hold button1 (for longer
than 2 seconds).
A call to the Customer Assistance
Center will be initiated. The button will
flash while the call is in progress. The
message
Connecting call will appear
in the multifunction display.
iThe indicator lamp on the Roadside
Assistance button• remains illuminated in
red for approximately 10 seconds during the
system self-check after switching on the ignition
(together with the SOS button and the
Information button¡).
See system self-check (
page 331) if the indi-
cator lamp does not come on in red or stays on
longer than approximately 10 seconds.
If the indicator lamp on the Roadside Assistance
button• is flashing continuously and there
was no voice connection to the Response Center
established, then the Tele Aid system could not
initiate a Roadside Assistance call (e.g. the rele-
vant cellular phone network was not available).
The message
Call failed appears in the mul-
tifunction display.
Roadside Assistance calls can be terminated
using thet button on the multifunction
steering wheel or the END button on the
COMAND system headunit.

335 Controls in detail
Useful features
When the connection is established, the
message
Call connected appears in the
multifunction display. The Tele Aid system
will transmit data generating the vehicle
identification number, model, color and
location (subject to availability of cellular
and GPS signals).
A voice connection between the Customer
Assistance Center representative and the
occupants of the vehicle will be estab-
lished. Information regarding the operation
of your vehicle, the nearest
Mercedes-Benz Light Truck Center or
Mercedes-Benz USA products and services
is available to you.
For more details concerning the Tele Aid
system, please visit www.mbusa.com and
use your ID and password (sent to you sep-
arately) to learn more (USA only).
iWhile the call is connected, you can change
to the navigation menu by pressing the NAV
button on the COMAND system headunit.
iThe indicator lamp in the Information
button¡ remains illuminated in red for
approximately 10 seconds during the system
self-check after switching on the ignition
(together with the SOS button and the Roadside
Assistance button•).
See system self-check (
page 331) if the
indicator lamp does not come on in red or stays
on longer than approximately 10 seconds.
If the indicator lamp in the Information
button¡ is flashing continuously and there
was no voice connection to the Response Center
established, then the Tele Aid system could not
initiate an Information call (e.g. the relevant
cellular phone network is not available).
The message
Call failed appears in the
multifunction display.
Information calls can be terminated using
thet button on the multifunction steering
wheel or the END button on the COMAND
system headunit.
!If the indicator lamps do not start flashing
after pressing one of the buttons or remain
illuminated (in red) at any time, the Tele Aid
system has detected a malfunction or the
service is not currently active, and may not
initiate a call. Visit your authorized
Mercedes-Benz Light Truck Center and have the
system checked or contact the Response Center
at 1-800-756-9018 (in the USA) or
1-888-923-8367 (in Canada) as soon as
possible.