Page 154 of 464

154 Controls in detailControl systemTEL menu*
You can use the functions in the 
Tel
 menu 
to operate your telephone, provided it is 
connected to a hands-free system and 
switched on.
Switch on the telephone and Audio or 
COMAND*.
Press buttonÿ orè on the 
steering wheel repeatedly until you see 
the 
Tel
 menu in the display.Which messages will appear in the display 
field depends on whether your telephone is 
switched on or off:
If the telephone is off, the message in 
the multifunction display is: 
Tel off
.
If the telephone is on:
The telephone will then search for a 
network. During this time the display is 
empty.
As soon as the telephone has found a 
network, 
READY
 is indicated in the dis-
play.
1Signal strength
This standby message indicates that your 
telephone is ready for use and you can op-
erate it using the control system.
Warning!
G
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 rec-
ommend that you pull over to a safe location 
and stop before placing or taking a tele-
phone call. If you choose to use the tele-
phone while driving, please use the 
hands-free device and only use the tele-
phone when weather, road and traffic condi-
tions permit.
Some jurisdictions prohibit the driver from 
using a cellular telephone while driving a ve-
hicle.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of approximately 
44 feet (approximately 13.5 m) every sec-
ond.
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, pos-
sibly resulting in an accident and ⁄or 
personal injury. 
     
        
        Page 256 of 464

256 Controls in detailUseful featuresTelephone*
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.
T he  e x t e r n a l  a n t e n n a  m u s t  b e  a p p r o v e d  b y  
Mercedes-Benz. Please contact an autho-
rized Mercedes-Benz Center for informa-
tion on the installation of an approved 
external antenna. Refer to the radio trans-
mitter operation instructions regarding use 
of an external antenna.You can take and place telephone calls us-
ing theí andì buttons on the 
steering wheel. To carry out other tele-
phone functions, use the control system 
(
page 154).
See separate operating manual for instruc-
tions on how to use the telephone.
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, pos-
sibly resulting in an accident and/or serious 
personal injury.
Warning!
G
Please do not forget that your primary re-
sponsibility 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 rec-
ommend that you pull over to a safe location 
and stop before placing or taking a tele-
phone call.
If you choose to use the telephone
1 while 
driving, please use the hands-free device 
and only use the telephone when road, traf-
fic and weather conditions permit. Some ju-
risdictions prohibit the driver from using a 
cellular telephone while driving a vehicle.
Only operate the COMAND* (Cockpit Man-
agement and Data System)
1 if road, traffic 
and weather conditions permit.
1Observe all legal requirements.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km / h), your vehicle is 
covering a distance of approx. 44 feet (ap-
proximately 13.5 m) every second. 
     
        
        Page 281 of 464

281 Operation
Driving instructions
Control and operation of radio trans-mitters
COMAND*, radio and telephone*Telephones and two-way radios
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.
Refer to the radio transmitter operation in-
structions regarding use of an external an-
tenna.
Catalytic converter
Your Mercedes-Benz is equipped with 
monolithic-type catalytic converters, an 
important element in conjunction with the 
oxygen sensors to achieve substantial con-
trol of the pollutants in the exhaust emis-
sions. Keep your vehicle in proper 
operating condition by following our rec-
ommended maintenance instructions as 
outlined in your Service Booklet.
Warning!
G
Please do not forget that your primary re-
sponsibility is to drive the vehicle safely. 
Only operate the COMAND (Cockpit Man-
agement and Data System), radio or tele-
phone
1 if road, traffic and weather 
conditions permit.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of approximately 
44 feet (approximately 13.5 m) every sec-
ond.
1Observe all legal requirements.
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, pos-
sibly resulting in an accident and/or serious 
personal injury.
!To prevent damage to the catalytic con-
verters, only use premium unleaded 
gasoline in this vehicle.
Any noticeable irregularities in engine 
operation should be dealt with prompt-
ly. Otherwise, excessive unburned fuel 
may reach the catalytic converter, 
causing it to overheat and start a fire.