Mercedes-Benz C-Coupe 2015 Owners Manual - Manual (Page 234)

Display messages Possible causes/consequences and M M Solutions
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Obtain a New Key Obtain a New Key
The SmartKey needs to be replaced.
X
Visit a qualified specialist workshop.
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Replace Replace Key Key Battery Battery
The batteries of the KEYLESS-GO key are discharged.
X Change the batteries (
Y
page 77).
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Don't Forget Your Don't Forget Your
Key Key
The display message is shown for a maximum of 60 seconds and
is only a reminder.
You have opened the driver's door with the engine switched off.
The KEYLESS-GO key is not in the ignition lock.
X
Remember to take the KEYLESS-GO key with you when you
leave the vehicle.
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Key Not Detected Key Not Detected
(red display message)
The KEYLESS-GO key 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 151).
X
Locate the KEYLESS-GO key.
The KEYLESS-GO key is not detected while the engine is running
because there is interference from a strong source of radio waves.
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 151).
X
Operate the vehicle with the SmartKey in the ignition lock.
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