Towing alarm MERCEDES-BENZ S550 2007 W221 Owner's Manual

76 Safety and SecurityAnti-theft systems
Disarming: Unlock your vehicle with
the SmartKey or KEYLESS-GO*.
The turn signal lamps flash once to in-
dicate that the alarm system is dis-
armed.
Tow-away alarm
Once the tow-away alarm is armed, a visual
and audible alarm will be triggered when
someone attempts to raise the vehicle.
To cancel the alarm after it has been trig-
gered, see “Canceling the alarm”
(page 76).

Arming: Lock your vehicle with the
SmartKey or KEYLESS-GO*.
The tow-away alarm is automatically
armed after about 30 seconds.

Disarming: Unlock your vehicle with
the SmartKey or KEYLESS-GO*.
To prevent triggering the tow-away alarm
feature, switch off the tow-away alarm be-
fore towing the vehicle, or when parking on
a surface subject to movement, such as a
ferry or auto train. To switch off the tow-away alarm, see
“Switching on/of the tow-away alarm”
(
page 228).
Canceling the alarm
To cancel the alarm, do one of the follow-
ing:
Insert the SmartKey in the starter
switch.

Press the Œ or ‹ button on the
SmartKey.
In vehicles with KEYLESS-GO*:

Grasp an outside door handle.
The SmartKey with KEYLESS-GO must
be within 3 ft. (1 m) of the vehicle.

Press the KEYLESS-GO start/stop but-
ton (
page 317).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
i
If the turn signal lamps does not flash three
times one of the following elements may not be
properly closed:


a door


the trunk
Close the respective element and lock the vehi-
cle again.
i
The alarm system will rearm automatically
again after approximately 40 seconds if no door
was opened.
i
If the alarm stays on for more than
30 seconds, a call to the Response Center is ini-
tiated automatically by the Tele Aid system
(
page 462) provided Tele Aid service was sub-
scribed to and properly activated and that neces-
sary mobile phone, power supply and GPS
coverage are available.
i
When you unlock your vehicle, the tow-away
protection disarms automatically.
The tow-away alarm remains disarmed until you
lock your vehicle again.


228 Control systemsCOMAND vehicle menu
Select “Vehicle”
“Vehicle”
“Trunk
Opening-height Restriction”.
A checkmark appears when the trunk
opening-height restriction is switched
on.

Confirming selection: Press n.
Switching on/of the tow-away alarm
To prevent triggering the tow-away alarm
feature (
page 76), 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.

Select “Vehicle”.
The main area is active.

Selecting “Tow-away Alarm” func-
tion: Slide omp or rotate ymz.

Confirming selection: Press n.or

Select “Vehicle”
“Vehicle”

“Tow-away Alarm”.
A checkmark appears when the
tow-away alarm is switched on.

Confirming selection: Press n.
i
The components and operating principles of
COMAND can be found on (
page 79).
i
You can program the tow-away alarm func-
tion (page 216) using the favorite button in the
center console.
When you press the favorite button, you can
switch the functions on or off.


642 Practical hintsTowing the vehicleMercedes-Benz recommends that the vehi-
cle be transported with all wheels off the
ground using flatbed or appropriate wheel
lift/dolly equipment. This method is pref-
erable to other types of towing.
When circumstances do not permit the
recommended towing methods, the vehi-
cle may be towed with all wheels on the
ground or front wheels raised only so far as necessary to have the vehicle moved to a
safe location where the recommended
towing methods can be employed.!
Do not tow-start the vehicle.
!
Use flatbed or wheel lift/dolly equipment
with SmartKey in starter switch turned to posi-
tion 0.
Do not tow with sling-type equipment. Towing
with sling-type equipment over bumpy roads will
damage radiator and supports.
To prevent damage during transport, do not tie
down vehicle by its chassis or suspension parts.
Switch off the ESP
® (page 73), the tow-away
alarm (
page 76) and the automatic central
locking (page 313).
If the vehicle’s transmission is damaged, only
have it towed with the drive shaft disconnected.
!
Make sure that the electric parking brake is
released. If the electric parking brake is malfunc-
tioning, release it mechanically (
page 616).
!
In vehicles with KEYLESS-GO, insert the
SmartKey into the starter switch under the
KEYLESS-GO button and turn the SmartKey in
the starter switch to 0.
!
If the vehicle is towed with the front axle
raised, the engine must be shut off (SmartKey in
starter switch starter switch position 0 or 1).
Otherwise the ESP
®/ETS will immediately be en-
gaged and will apply the rear wheel brakes.
While towing, the battery must be connected and
charged. Otherwise:


you will not be able to switch on the ignition


you will not be able to engage the automatic
transmission in position N
When towing the vehicle with all wheels on the
ground, the automatic transmission must be
shifted to N and the SmartKey must be in starter
switch position2.
In vehicles with KEYLESS-GO*, you must use the
starter switch under the KEYLESS-GO* button
(
page 315).
When towing the vehicle with all wheels on the
ground or the front axle raised, 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).
!
To be certain to avoid a possibility of dam-
age to the drivetrain, 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.

643 Practical hints
Towing the vehicle
Warning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the brake sys-
tem


there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
as that will be necessary to adequately con-
trol the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make sure the SmartKey is in
starter switch position 2 and automatic
locking is deactivated (
page 223).
Warning!
G
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 ve-
hicle. Adapt your driving accordingly.i
The automatic transmission will remain
locked in position P and the SmartKey will not
turn in the starter switch if the consumer battery
is disconnected or discharged. See information
on the battery (
page 634) or on jump starting
(
page 639).
i
To signal turns while being towed with the
hazard warning flasher in use, turn SmartKey in
starter switch to position 2 and activate the com-
bination switch for the left or right turn signal in
the usual manner – only the selected turn signal
will operate.
Upon canceling the turn signal, the hazard warn-
ing flasher will operate again.
!
When towing the vehicle with all wheels on
the ground, please note the following:
With the automatic central locking activated and
the SmartKey in starter switch position 2, or
KEYLESS-GO* start/stop button (
page 317)
in position 2, the vehicle doors lock if the left
front wheel as well as the right rear wheel are
turning at vehicle speeds of approximately
9mph (15km/h) or more.
Switch off the tow-away alarm (
page 76).
To prevent the vehicle doors from locking, deac-
tivate the automatic central locking
(
page 313).
Towing of the vehicle should only be done using
the properly installed towing eye bolt. Never at-
tach tow cable, tow rope or tow rod to vehicle
chassis, frame or suspension parts.

698 IndexTemperature
Outside temperature indicator 29
Setting interior temperature
(COMAND) 230
Tires 510
Tie-down hooks, Trunk 453
Tightening torque, Wheel bolts 633, 678
Tilt/sliding sunroof see Power tilt/sliding
sunroof
Time
Setting (COMAND) 213
TIN 527
Tire and Loading Information
Placard 504
Tire Identification Number see TIN
Tires 500
Advanced Tire Pressure Monitoring
System (Advanced TPMS)* 511
And Rims 655
And Wheels 500
Care and maintenance 501
Chains 531
Checking inflation pressure electroni-
cally with Advanced Tire Pressure
Monitoring System (Advanced
TPMS)* 511Checking inflation pressure electroni-
cally with Run Flat Indicator (Canada
only) 515
Cleaning 502
Cold tire inflation pressure 526
Direction of rotation 503
Driving instructions 482
Important notes on tire inflation
pressure 510
Inflation pressure 509
Information placard 504
Inspection 501
Load rating 519, 528
Load rating, Maximum 523, 527
Minispare wheel 613, 658
Ply composition and material
used 528
Problems under-/overinflation 509
Retreads 500
Rotating 529
Run Flat Indicator (Canada only) 515
Service life 501
Sizes 655
Snow 530
Speed rating 484, 520, 528
Storing 502Supplemental tire inflation pressure
information 489
Temperature 510, 525
Terminology 526
TPMS malfunction telltale 553
Traction 483, 528
Tread depth 502
Tread depth, Winter 530
Treadwear indicators 528
Vehicle maximum load on 528
Wear pattern 529
Winter 530
Tools 611
Top tether
Children in the vehicle 64
Tow-away alarm 76
Tow-away alarm (COMAND) 228
Towing eye bolt (vehicle tool kit) 611,
644
Towing the vehicle 642
Tow-start 639, 642
Traction 73, 483, 525, 528
Transmission see Automatic transmission
Traveling abroad 486
Tread 528
Tread depth, Tires 502