Mercedes-Benz S-Class 2012 - Manual (Page 421)

SmartKey
Display messages Possible causes/consequences and M Solutions
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Key Does Not
Belong to Vehicle
You have put the wrong SmartKey in the ignition lock.
X Use the correct SmartKey.
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Take Your Key From
Ignition
The SmartKey is in the ignition lock.
X Remove the SmartKey.
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Obtain a New Key
The SmartKey needs to be replaced.
X Visit a qualified specialist workshop.
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Replace Key Battery
The batteries of the KEYLESS-GO key are discharged.
X Change the batteries ( Y page 82).
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Don't Forget Your
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
(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 Engage the electric parking brake.
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 Engage the electric parking brake.
X Operate the vehicle with the SmartKey in the ignition lock.
Display messages
419
On-board computer and displays
Z