Mercedes-Benz C-Sedan 2015 Owners Manual - Manual (Page 285)

Display messages Possible causes/consequences and M M Solutions
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Replace Replace Key Key Battery Battery
The SmartKey batteries are discharged.
X
Change the batteries (
Y
page 84).
Â
Don't Forget Your Don't Forget Your
Key Key
The SmartKey is not in the ignition lock. You have opened the
driver's door with the engine switched off.
This display message is displayed for a maximum of 60 seconds
and is simply a reminder.
X
Take the SmartKey with you when you leave the vehicle.
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Key Not Detected Key Not Detected
(white display mes-
sage)
The SmartKey is currently undetected.
X
Change the location of the SmartKey in the vehicle.
If the SmartKey still cannot be detected:
X
Insert the SmartKey into the ignition lock and turn it to the
desired position.
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Key Not Detected Key Not Detected
(red display message)
The SmartKey is not in the vehicle.
A warning tone also sounds.
If the engine is switched off, you can no longer lock the vehicle
centrally or start the engine.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (
Y
page 174).
X
Locate the SmartKey.
X Press a on the steering wheel to confirm the display mes-
sage.
Because there is interference from a strong source of radio waves,
the SmartKey is not detected whilst the engine is running.
A warning tone also sounds.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (
Y
page 174).
X Operate the vehicle with the SmartKey in the ignition lock.
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Remove Remove 'Start' 'Start' But‐ But‐
ton and Insert Key ton and Insert Key
The SmartKey is continually undetected.
The SmartKey detection function has a temporary malfunction or
is faulty. A warning tone also sounds.
X
Insert the SmartKey into the ignition lock and turn it to the
desired position.
X Visit a qualified specialist workshop.
Display messages
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