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Occupant safety
51G
Risk of injury
If the front-passenger front airbag is not
disabled:
R a child secured in a child restraint system
on the front-passenger seat can be seri-
ously and even fatally injured by the
front-passenger airbag deploying. This is
especially likely if the child is in the imme-
diate vicinity of the front-passenger front
airbag when it is deployed.
R a child must never be secured on the
front-passenger seat in a rearward-facing
child restraint system. Only secure a
rearward-facing child restraint system on
a suitable rear seat.
R always move the front-passenger seat to
the rearmost position if you secure a
child in a forward-facing child restraint
system on the front-passenger seat.
The front-passenger front airbag is not dis-
abled:
R on vehicles without automatic child seat
recognition in the front-passenger seat*
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat* if there is no child restraint system with
automatic child seat recognition fitted to
the front-passenger seat.
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat*, if
the 5 PASSENGER AIRBAG OFF warn-
ing lamp is not lit.
To draw attention to this danger, there is an
appropriate warning sticker on the dash-
board as well as on both sides of the sun
visor on the front-passenger side.
Information about recommended child
restraint systems is available at any
Mercedes-Benz Service Centre.
Automatic child seat recognition on the
front-passenger seat*
If your vehicle does not have automatic child
seat recognition on the front-passenger seat,
this is indicated by a special sticker.
The sticker is affixed to the side of the dash-
board on the front-passenger side. It is visible
when you open the front-passenger door.
The warning lamp 6
is located on the centre
console.1 5 PASSENGER AIRBAG OFF warning
lamp
The front-passenger seat sensor system for
child restraint systems detects whether a
special Mercedes-Benz child seat with auto-
matic child seat recognition has been fitted.
In such cases, the 5 PASSENGER AIRBAG
OFF indicator lamp 1 lights up. The front-
passenger airbag is deactivated.
G Risk of injury
If the 5 PASSENGER AIRBAG OFF warn-
ing lamp does not light up when the child
restraint system is fitted, the front-
passenger front airbag has not been disa-
bled. If the front-passenger front airbag is
6 Vehicles without automatic child seat recognition in the front-passenger seat: the warning lamp lights up briefly when you turn the key to position 2 in the ignition
lock. However, it has no function and does not indicate that there is automatic child seat recognition on the front-passenger seat.
Safety
* optional
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Z
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Occupant safety
52 inflated, the child could be seriously or even
fatally injured.
Proceed as follows:
R
Do not use a rearward-facing child
restraint system on the front-passenger
seat.
R Fit a rearward-facing child restraint sys-
tem on a suitable rear seat.
or
R Only use a forward-facing child seat on
the front-passenger seat and move the
front-passenger seat to its rearmost
position.
R Have the automatic child seat recogni-
tion checked at a qualified specialist
workshop. To ensure that the automatic child seat rec-
ognition on the front-passenger seat func-
tions correctly, never place objects (such
as a cushion) under the child restraint sys-
tem. The entire base of the child restraint
system
must always be resting on the seat
cushion. An incorrectly fitted child restraint
system cannot perform its intended pro-
tective function in the event of an accident,
and could even lead to injuries.
i The windowbag, the sidebag and the belt
tensioner on the front-passenger side are
still active even if the front-passenger front
airbag is disabled. G
Risk of injury
Do not place items of electronic equipment
on the front-passenger seat, e.g.:
R laptops, if switched on
R mobile phones
R cards with transponders, e.g. ski passes
or access passes
Signals from electronic equipment can
cause interference in the automatic child
seat recognition sensor system. This can
lead to a system malfunction. This may
cause the 5 PASSENGER AIRBAG OFF
warning lamp to light up without there
being
a child seat with automatic child seat
recognition fitted. This means the front-
passenger airbag is not deployed during an
accident. It is also possible that the
5 PASSENGER AIRBAG OFF warning
lamp will not light up if you turn the key in
the ignition lock to position 2.Safety
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Page 226 of 329

Display messages
223Display messages Possible cause/consequence Possible solution
P Selector lever in
park position You have switched off the engine with the
KEYLESS
GO button* and opened the driv-
er's door.
or
With HOLD activated, you have either:
R opened the driver’s door and released
the seat belt or
R switched off the engine or
R opened the bonnet
The horn may also sound at regular inter-
vals. The horn becomes louder if you
attempt to lock the vehicle.
The engine cannot be started. X
Move the selector lever to P.
The engine can be started again. P Selector lever in
park position You have tried to switch off the engine
with the KEYLESS GO button*
while the
selector lever is in position R or D. X
Move the selector lever to P. Please shift to P or N You have attempted to start the engine
while the selector lever is not in position
P or N. X
Move the selector lever to P or N. PRE-SAFE inoperative See
Owner's Manual
PRE-SAFE
®
has failed. All other occupant
safety
systems, e.g. airbags, remain avail-
able. X
Visit a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
242 Problem Possible cause/consequence Suggested solutions
The steering wheel heating* indi-
cator
lamp on the lower left lever
of the steering column is flashing. There is insufficient voltage
because
too many consumers are
switched on. The steering wheel
heating* has switched itself off
automatically. X
Switch off consumers that are not required, e.g. reading lamps,
interior lighting, etc.
The steering wheel heating*
will automatically switch back on as
soon as there is sufficient voltage again. The indicator lamp in the
2
button on the Thermatic/4-zone
Thermotronic* control panel
flashes three times when you
press
the button. The cooling sys-
tem cannot be switched on. Cooling has been deactivated
due to a malfunction. X
Visit a qualified specialist workshop. The indicator lamp in the
¯
rear-window heating button is
flashing. The rear-window heat-
ing
has switched itself off prema-
turely or cannot be switched on. There is insufficient voltage
because
too many consumers are
switched on. X
Switch off consumers that are not required, e.g. reading lamps,
interior lighting, etc.
The
rear-window heating will automatically switch back on as soon
as there is sufficient voltage again. Vehicles with automatic child
seat recognition on the front-
passenger seat*:
The 5 PASSENGER AIRBAG
OFF warning lamp on the centre
console is lit. A special Mercedes-Benz child
seat with automatic child seat
recognition
has been fitted to the
front-passenger seat. The front-
passenger airbag has therefore
been disabled. Practical advice
* optional
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Page 246 of 329
Troubleshooting
243Problem Possible cause/consequence Suggested solutions
Vehicles with automatic child
seat recognition on the front-
passenger seat*:
The 5 PASSENGER AIRBAG
OFF warning lamp on the centre
console is lit.
G
Risk of injury
There is no child seat fitted to the
front-passenger seat. The auto-
matic child seat recognition* is
malfunctioning. X
Remove electronic equipment from the front-passenger seat, e.g.:
R
Notebooks
R Mobile phones
R Cards with transponders, e.g. ski passes or access passes
If the 5 PASSENGER AIRBAG OFF warning lamp is still lit:
X Visit a qualified specialist workshop. Practical advice
* optional
219_AKB; 2; 4, en-GB
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