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Engine diagnostics require a running engine.
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The transmission oil temperature has excee-
ded the range that is suitable for the system.
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The temperature in the vehicle interior devi-
ates from the set range.
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The system detects moisture on the wind-
screen when the air conditioning system is
switched on.
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The state of charge of the battery is too low.
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The battery temperature has exceeded the
range that is suitable for the system.
Good to know
▌Deactivating the function of the key
Vehicles with KEYLESS-GO: if you deactivate the
function of the key, the KEYLESS-GO functions are
also deactivated. Access or drive authorization via
KEYLESS-GO is then no longer possible with that
key. Activate the function of the key so that all of
its functions are available once again.
You can also deactivate the key's function to
reduce the key's energy consumption if you do
not use the vehicle or a key for an extended
period of time.
#
Press and hold the key button ß.
#
With the key button ß pressed, immedi-
ately press key button Ü twice in quick
succession.
The indicator light of the key lights up once
briey, and then again for longer.
%
You have the following options to reactivate
the key:
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Press any button on the key.
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Start the vehicle with the key in the centre
console storage compart-
ment(/ page 249).
▌Overview of emergency call systems
Both the Mercedes-Benz emergency call system
as well as the 112 emergency call system (EU
eCall) can help to reduce the time between an
accident and the arrival of emergency services at
the site of the accident. They help locate an acci-
dent site in places that are dicult to access.
Both emergency call systems can initiate an emer-
gency call automatically (/ page 545) or man-
ually (/ page 545).
Only make emergency calls if you or others are in
need of rescue. Do not make an emergency call in
the event of a breakdown or a similar situation.
Indicators in the displays
The following messages appear on the central dis-
play or the media display of both emergency call
systems:
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SOS NOT READY: the vehicle is not switched
on or the emergency call system is malfunc-
tioning. This does not necessarily indicate
complete failure of the emergency call system.
Emergency calls can still be transmitted.
The display only refers to the vehicle and does
not take account of the availability of mobile
phone networks and the Mercedes-Benz emer-
gency call centre.
The functional readiness of the emergency call
system on the vehicle can be seen when the
SOS NOT READY display disappears once the
vehicle is switched on.
58
Quick start and Tips
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