Page 44 of 399
41 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Trunk
The lock is located next to the recessed handle.
Notes:
In case of a malfunction in the central locking system 
the trunk can be unlocked individually.
The mechanical key does not operate the central locking 
system or antitheft alarm system.
When unlocking the trunk with the mechanical key, the 
exterior lamps will flash and the alarm will sound.
To cancel the alarm, insert the electronic key in the 
starter switch or press buttonŒ or‹ on the 
electronic key.
If the fuel filler flap cannot be opened, see page 354.0Neutral position
1Unlocking – turn mechanical key to position 1, hold 
and pull handle to open
Important!
Do not place mechanical key inside trunk, since trunk is 
locked again when closing the lid if the vehicle has been 
previously centrally locked.
P88.50-2273-26 
     
        
        Page 46 of 399
43 Central locking system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Trunk lid emergency release
The emergency release button (1) is located in the trunk 
lid.
Briefly press emergency release button (1).
The trunk unlocks and the trunk lid opens.Important!
The emergency release button (1) does not open the 
trunk lid, if the vehicle battery is discharged or 
disconnected.
Illumination of the emergency release button (1):
The button will blink for 30 minutes after opening the 
trunk.
The button will blink for 60 minutes after closing the 
trunk.
Note:
When pressing the emergency release button (1) and 
the vehicle was centrally locked, the exterior lamps will 
flash and the alarm will sound.
To cancel the alarm, insert the electronic key in the 
starter switch or press buttonŒ or‹ on the 
electronic key.
P80.20-2301-26 
     
        
        Page 47 of 399
44 Antitheft alarm system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Antitheft alarm system (optional for Canada )
1Indicator lamp in switch located in center consoleThe antitheft alarm is automatically armed or disarmed 
with the remote control by locking or unlocking the 
vehicle.
The antitheft alarm is armed within approximately 
10 seconds after locking the vehicle.
A blinking lamp (1) indicates that the alarm is armed.
P54.25-2500-26 
     
        
        Page 48 of 399
45 Antitheft alarm system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Operation:
Once the alarm system has been armed, the exterior 
vehicle lamps will flash and an alarm will sound when 
someone:
•opens a door,
•opens the trunk,
•opens the hood,
•attempts to raise the vehicle.
The alarm will last approximately 3 minutes in form of 
flashing exterior lamps. At the same time an alarm will 
sound for 30 seconds. The alarm will stay on even if the 
activating element (a door, for example) is immediately 
closed. If the alarm stays on for more than 20 seconds, 
an emergency call is initiated automatically. See Tele 
Aid on page 228.Notes:
When you unlock the driver’s door with the mechanical 
key, the exterior lamps will flash and the alarm will 
sound. 
To cancel the alarm, insert the electronic key in the 
starter switch or press buttonŒ or‹ on the 
electronic key. 
     
        
        Page 49 of 399

46 Tow-away alarm
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Tow-away alarm (optional for Canada)
The switch is located in the center console.
1Press to switch off tow-away alarm
2Indicator lamp
Once the alarm system has been armed, the exterior 
vehicle lamps will flash and an alarm will sound when 
someone attempts to raise the vehicle.The alarm will last approximately 3 minutes in form of 
flashing exterior lamps. At the same time an alarm will 
sound for 30 seconds. The alarm will stay on even if the 
vehicle is immediately lowered. To cancel the alarm, 
insert the electronic key in the starter switch or press 
buttonŒ or‹ on the electronic key.
If the alarm stays on for more than 20 seconds, an 
emergency call is initiated automatically. See Tele Aid 
on page 228.
To pr even t tr igger in g t he tow-away alarm  feature,  switch 
off the tow-away alarm before towing the vehicle, or 
when parking on a surface subject to movement, such 
as a ferry or auto train.
To do so, turn electronic key in starter switch to 
position 0 or 1, or remove electronic key from starter 
switch. Press tow-away alarm switch (1). The indicator 
lamp (2) illuminates briefly.
Exit vehicle, and lock vehicle with the electronic key.
The tow-away alarm remains switched off until the 
vehicle is locked again with the electronic key, at which 
time it is automatically reactivated. 
     
        
        Page 231 of 399

228 Tele Aid
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Tele Aid (optional)
Important!
The initial activation of the Tele Aid system may only be 
performed by completing the subscriber agreement and 
placing an acquaintance call using the “SOS” button. 
Failure to complete either of these steps will result in a 
system that is not activated. If the system is not 
activated the indicator lamp in the “SOS” button stays 
on after turning electronic key in starter switch to 
position 2 and the message “TELE AID – NOT 
ACTIVATED” will be shown in the multifunction display 
for approx. 10 seconds.
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).
(Te l ematic Alarm Identification on Demand)
The Tele Aid system consists of three types of response; 
automatic and manual emergency, roadside assistance 
and information.
The Tele Aid system is operational providing that the 
vehicle’s battery is charged, properly connected, not 
damaged and cellular and GPS coverage is available.The speaker volume of a Tele Aid call can be adjusted 
when using the volume control on the multifunction 
steering wheel, for raising press buttonæand for 
lowering press buttonç.
To activate, press the “SOS” button, the Roadside 
Assistance button or the Information button¡, 
depending on the type of response required.
Shortly after the completion of your Acquaintance Call, 
you will receive a user ID and password via first call 
mail. By visiting www.mbusa.com and selecting “Tele 
Aid” (USA only), you will have access to account 
information, remote door unlock, Info Services
* profile 
and more.
* Optional (available only with COMAND)System self-check
Initially, after turning the electronic key in starter 
switch to position 2, malfunctions are detected and 
indicated (the indicator lamps in the “SOS” button, the 
Roadside Assistance button and the Information 
button¡ stay on longer than 10 seconds or do not 
come on). The message “TELE AID – VISIT 
WORKSHOP” appears for approx. 10 seconds in the 
multifunction display.  
     
        
        Page 232 of 399

229 Tele Aid
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Important!
Always make sure that the indicator lamps in the 
“SOS” button, in the “Roadside Assistance” button and 
in the “Information” button do not remain illuminated 
constantly in red and the message “TELE AID – VISIT 
WORKSHOP” is not displayed in the multifunction 
display after the system self check.
If a malfunction is indicated as outlined above, have the 
system checked at the nearest Mercedes-Benz Center as 
soon as possible.
Emergency calls
An emergency call is initiated automatically:
•following an accident in which the Emergency 
Tensioning Retractors (ETR’s) or airbags deploy,
•if the antitheft alarm or the tow-away alarm stays on 
for more than 20 seconds, see pages 44 and 46.
An emergency call can also be initiated manually by 
opening the cover next to the inside rear view mirror 
labeled “SOS”, then briefly pressing the button located 
under the cover. See below for instructions on initiating 
an emergency call manually.Once the emergency call is in progress, the indicator 
lamp in the “SOS” button will begin to flash. The 
message “EMERGENCY CALL – CONNECTING CALL” 
appears in the multifunction display. When the 
connection is established, the message “EMERGENCY 
CALL – CALL CONNECTED” appears in the 
multifunction display. All information relevant to the 
emergency, such as the location of the vehicle 
(determined by the GPS satellite location system), 
vehicle model, identification number and color are 
generated.
A voice connection between the Response Center and 
the occupants of the vehicle will be established 
automatically soon after the emergency call has been 
initiated. When a voice connection is established the 
audio system mutes and the message “TELE AID – 
EMERGENCY CALL ACTIVE” appears in the 
multifunction display. The Response Center will attempt 
to determine more precisely the nature of the accident 
provided they can speak to an occupant of the vehicle. 
     
        
        Page 346 of 399

343 Towing the vehicle
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index We recommend that the vehicle be transported using 
flat bed equipment. This method is preferable to other 
types of towing.
Important!
To prevent damage during transport, do not tie down 
vehicle by its chassis or suspension parts.
Towing restrictions for vehicles with automatic 
transmission:
The vehicle may be towed with all wheels on the ground 
and the selector lever in position “N” for distances up to 
30 miles (50 km) and at a speed not to exceed 30 mph 
(50 km / h). The electronic key must be in starter switch 
position 2.
To be certain to avoid a possibility of damage to the 
transmission, however, we recommend the drive shaft 
be disconnected at the rear axle drive flange for any 
towing beyond a short tow to a nearby garage.
Do not tow with sling-type equipment. Towing with 
sling-type equipment over bumpy roads will damage 
radiator and supports.
Use wheel lift, dolly, or flat bed equipment, with 
electronic key in starter switch turned to position 0.Note:
To signal turns while being towed with hazard warning 
flasher in use, turn electronic key in starter switch to 
position 2 and activate combination switch for left or 
right turn signal in usual manner – only the selected 
turn signal will operate.
Upon canceling the turn signal, the hazard warning 
flasher will operate again.
Caution!
If the vehicle is towed with the front axle raised, the 
engine must be shut off (electronic key in starter switch 
position 0 or 1). Otherwise, the ESP will immediately be 
engaged and will apply the rear wheel brakes.
Switch off the tow-away alarm (see page 46) as well as 
the ESP (see page 274).
Wa r n i n g !
With the engine not running, there is no power 
assistance for the braking 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.