Mercedes-Benz CL-Class 2012 - Manual (Page 379)

Display messages Possible causes/consequences and M Solutions
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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.
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Key Not Detected
(White display
message)
The KEYLESS-GO key cannot be detected at present.
X Change the location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected:
X Operate the vehicle with the SmartKey in the ignition lock.
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Key Detected In
Vehicle
The KEYLESS-GO key has been detected inside the vehicle during
locking.
X Remove the KEYLESS-GO key from the vehicle.
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Remove 'Start'
Button and Insert
Key
KEYLESS-GO is temporarily malfunctioning or is defective.
X Insert the SmartKey into the ignition lock and turn it to the
desired position.
X Visit a qualified specialist workshop.
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Close Doors to
Lock Vehicle
At least one door is open. A warning tone also sounds.
X Close all doors and lock the vehicle again.
Display messages
377
On-board computer and displays
Z