Mercedes-Benz 2011 E-Class Sedan Operator's Manual page 80

SmartKey
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this equipment must not emit harmful,
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electromagnetic radiation.
this equipment receives electromagnetic
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radiation, including radiation which can
trigger unwanted functions.
Any unauthorized change to this equipment
can lead to the user's operating license
being withdrawn.
Important information for using
KEYLESS-GO
You can use the KEYLESS-GO key as a
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conventional key.
You can combine KEYLESS-GO functions
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with those of a conventional key (e.g. open
with KEYLESS-GO and close with the
& button).
Always carry your KEYLESS-GO key on your
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person.
Never keep the KEYLESS-GO key with:
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electronic equipment, such as your
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mobile phone or another key
metal objects, such as coins or metal foil
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This may impair the functioning of KEYLESS-
GO.
To open or close the vehicle, the KEYLESS-
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GO key should be no more than 3 ft (1 m)
from the door or trunk/cargo area.
When the vehicle is parked for more than
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72 hours, the KEYLESS-GO function is
deactivated. Pull one of the outer door
handles and turn on the ignition to
reactivate the KEYLESS-GO function.
If the KEYLESS-GO key is not near the
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vehicle, it is possible that the system may
not recognize it. In this case, the vehicle
cannot be locked or started with KEYLESS-
GO.
If the KEYLESS-GO key has been removed
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from the vehicle (e.g. if a passenger leaves
the vehicle with the KEYLESS-GO key):
while someone is holding the Start/Stop
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button or attempting to lock the vehicle
with the outer door handle, the message
Key not detected appears in the
multifunction display
while the engine is running, the red
-
message Key not detected appears in
the multifunction display as you pull
away. Find the KEYLESS-GO key or
change its current position immediately
(e.g. place it on the front-passenger seat
or carry it in your shirt pocket.)
If you have started the engine using the
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Start/Stop button, you can turn if off again
by:
pressing the Start/Stop button again
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inserting the KEYLESS-GO key in the
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ignition lock when the vehicle is
stationary and the automatic
transmission is in parking position P.
You may accidentally unlock the vehicle if
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the KEYLESS-GO key is within 3 ft (1 m) of
the vehicle and:
an outer door handle comes into contact
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with water
or
you are cleaning an outer door handle.
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Note that the engine can be started by any
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vehicle occupant if a KEYLESS-GO key is in
the vehicle.
Option 1: there is a KEYLESS-GO key in the
vehicle and a KEYLESS-GO key outside the
vehicle. If you leave the KEYLESS-GO key
behind when you get out and lock the
vehicle, a message does not appear in the
multifunction display.
Option 2: there is a KEYLESS-GO key in the
vehicle but no KEYLESS-GO key outside the
vehicle. When you get out and try to lock
the vehicle, the message Key still in
vehicle appears in the multifunction
display. The vehicle is not locked in this
case.
When starting the engine and while driving,
KEYLESS-GO also checks whether a valid key
is in the vehicle by periodically establishing
radio contact.