Mercedes-Benz S-Class 2014 Owners Manual - Manual (Page 303)

Display messages Possible causes/consequences and M M Solutions
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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 190).
X
Locate the SmartKey.
X Press a on the steering wheel to confirm the display
message.
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 190).
X Operate the vehicle with the SmartKey in the ignition lock.
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Remove 'Start' Remove 'Start'
Button and Insert Button and Insert
Key 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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