Page 137 of 290
134 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Initiating an emergency call manually
Briefly press on cover (1) – the cover will open. Press the SOS button (2) briefly. The indicator lamp in
the SOS button (2) will flash until the emergency call is
concluded. Wait for a voice connection to the Response
Center.
Close the cover (1) after the emergency call is
concluded.
P54.30-3044-26
1S
O
S
P54.30-3045-26
2
Page 138 of 290

135 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Roadside Assistance button •
Located below the center armrest cover is the Roadside
Assistance button•. Pressing and holding the
button (for longer than 2 seconds), will initiate a call to
a Mercedes-Benz Roadside Assistance dispatcher. The
button will flash while the call is in progress. 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 Roadside Assistance
dispatcher and the occupants of the vehicle will be
established. The nature of the need for assistance can
then be described. 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 Center. For services such as labor and/
or towing charges may apply. Refer to the Roadside
Assistance manual for more information.
These programs are 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,
•Remote Vehicle Diagnostics: This function permits
the Mercedes-Benz Roadside Assistance dispatcher
to download malfunction codes and actual vehicle
data.
Notes:
The indicator lamp in the Roadside Assistance
button• remains illuminated in red for
approximately 10 seconds during the system self-check
after turning key in steering lock to position 2 (together
with the “SOS” button and the Information
button¡).
Wa r n i n g !
If you feel at any way in jeopardy when in the
vehicle (e.g. smoke or fire in the vehicle, vehicle in
a dangerous road location), please do not wait for
voice contact after you have pressed the emergency
button. Carefully leave the vehicle and move to a
safe location. The Response Center will
automatically contact local emergency officials
with the vehicle’s approximate location if they
receive an automatic “SOS” signal and cannot make
voice contact with the vehicle occupants.
Page 139 of 290

136 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
See system self-check on page 132 when the indicator
lamp does not light up in red or stays on longer than
approximately 10 seconds.
If the indicator lamp in the Roadside Assistance
button• is illuminated continuously and there was
no voice connection to the Response Center established,
then the Tele Aid system could not initiate an Roadside
Assistance call (e.g. the relevant cellular phone network
is not available).
Information button ¡
Located below the center armrest cover is the
Information button¡. Pressing and holding the
button (for longer than 2 seconds), will initiate a call to
the Client Assistance Center. The button will flash while
the call is in progress. 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 Client Assistance
Center representative and the occupants of the vehicle
will be established. Information regarding the operation
of your vehicle, the nearest Mercedes-Benz Center or
Mercedes-Benz USA products and services is available
to you.For more details concerning Tele Aid, please visit
www.mbusa.com and use your ID and password, sent to
you separately, to learn more (USA only).
Notes:
The indicator lamp in the Information button¡
remains illuminated in red for approximately
10 seconds during the system self-check after turning
key in steering lock to position 2 (together with the
“SOS” button and the Roadside Assistance button•).
See system self-check on page 132 when the indicator
lamp does not light up in red or stays on longer than
approximately 10 seconds.
If the indicator lamp in the Information button¡ is
illuminated 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
ava i l ab le ).
Page 140 of 290

137 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Important!
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 fault
or the service is not currently active, and may not
initiate a call. Visit your Mercedes-Benz 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.
Upgrade Signals
Tele Aid system processes calls using the following
priority.
•Automatic emergency – First priority
•Manual emergency – Second priority
•Roadside assistance – Third priority
•Information – Fourth priority
Should a higher priority call be initiated while you are
connected, an upgrade (alternating) tone will be heard,
and the appropriate indicator lamp will flash. If certain
information such as vehicle identification number or
client information is not available, the operator may
need to retransmit. During this time you will hear a chirp and voice contact will be interrupted. Voice
contact will resume once the retransmission is
completed. Once a call is concluded, a chirp will be
heard and the appropriate indicator lamp will stop
flashing. The audio system operation will resume.
Important!
If the indicator lamp continues to flash or the system
does not reset, contact the Response Center at
1-800-756-9018 (in the USA) or 1-888-923-8367 (in
Canada), or Mercedes-Benz Client Assistance at
1-800-FOR-MERCedes (1-800-367-6372) in the USA or
Customer Service at 1-800-387-0100 in Canada.
Notes:
The indicator lamp in the respective button flashes until
the call is concluded and this can only be completed by
a Response Center or Client Assistance Center
representative.
When a Tele Aid call has been initiated, the audio
system is muted and the selected mode (radio, tape or
CD) pauses. The optional cellular phone (if installed)
switches off. If you must use this phone, the vehicle
must be parked. Disconnect the coiled cord and place
the call.
Page 141 of 290

138 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Remote door unlock
In the case you have your vehicle locked unintentionally
(e.g. key inside vehicle), and the reserve key is not
handy, contact the Mercedes-Benz Response Center at
1-800-756-9018 (in the USA) or 1-888-923-8367 (in
Canada). You will be asked to provide your password
which you provided when you completed the subscriber
agreement.
Then return to your vehicle and pull outside trunk
handle for a minimum of 20 seconds.
The Response Center will then unlock your vehicle with
the remote door unlocking feature.
Note:
The remote door unlock feature is available if the
relevant cellular phone network is available.
The SOS button will flash to indicate receipt of the door
unlock command. Once the vehicle is unlocked, a
Response Center specialist will attempt to establish
voice contact with the vehicle occupants.
If the trunk handle was pulled for more than 20 seconds
before door unlock authorization was received by the
Response Center, you must wait 15 minutes before
pulling the trunk handle again.Stolen vehicle tracking services
In the event your vehicle was stolen, report the incident
to the police who will issue numbered incident report.
Pass this number on to the Mercedes-Benz Response
Center.
The Response Center will then attempt to covertly
contact the vehicle’s Tele Aid system. Once the vehicle
is located, the Response Center will contact the local
Law Enforcement and you. The vehicle’s location will
only be provided to Law Enforcement.
Page 142 of 290
139 Tele Aid
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Important!
Tele Aid utilizes the cellular network for
communication and the GPS (Global Positioning
System) satellites for vehicle location. If either of these
signals are unavailable, the Tele Aid system may not
function and if this occurs, assistance must be
summoned by other means.
Wa r n i n g !
The Tele Aid control unit is located under the
driver’s seat. If there is accumulation of water or
other liquid in this area, the Tele Aid control unit
could suffer an electrical short circuit making the
system inoperative. In this case the indicator lamp
in the “SOS” button does not illuminate during or
remains illuminated after the system self-check.
Have the system checked at the nearest
Mercedes-Benz Center as soon as possible.
Page 143 of 290

140 Catalytic converter
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Catalytic converter
Your Mercedes-Benz is equipped with monolithic type
catalytic converters, an important element in
conjunction with the oxygen sensors to achieve
substantial control of the pollutants in the exhaust
emissions. Keep your vehicle in proper operating
condition by following our recommended maintenance
instructions as outlined in your Service Booklet.
Caution!
To prevent damage to the catalytic converters, use only
premium unleaded gasoline in this vehicle.
Any noticeable irregularities in engine operation should
be repaired promptly. Otherwise, excessive unburned
fuel may reach the catalytic converter causing it to
overheat, which could start a fire.
Wa r n i n g !
As with any vehicle, do not idle, park or operate
this vehicle in areas where combustible materials
such as grass, hay or leaves can come into contact
with the hot exhaust system, as these materials
could be ignited and cause a vehicle fire.
Page 144 of 290

141 Emission control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Emission control
Certain systems of the engine serve to keep the toxic
components of the exhaust gases within permissible
limits required by law.
These systems, of course, will function properly only
when maintained strictly according to factory
specifications. Any adjustments on the engine should,
therefore, be carried out only by qualified Mercedes-
Benz Center authorized technicians. Engine
adjustments should not be altered in any way. Moreover,
the specified service jobs must be carried out regularly
according to Mercedes-Benz servicing requirements.
For details refer to the Service Booklet.
Wa r n i n g !
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon monoxide,
and inhaling it can cause unconsciousness and
lead to death.Do not run the engine in confined areas (such as a
garage) which are not properly ventilated. If you
think that exhaust gas fumes are entering the
vehicle while driving, have the cause determined
and corrected immediately. If you must drive under
these conditions, drive only with at least one
window fully open.