Mercedes-Benz S-Class 2011 Operator's Manual page 414

Display messages
412
Display messages
Â
Key Not Detected
(white display
message)
Â
Key Detected In
Vehicle
Â
Remove 'Start'
Button and Insert
Key
Â
Close Doors to
Lock Vehicle
Possible causes/consequences and M Solutions
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
Change the location of the key with the KEYLESS-GO functions
in the vehicle.
X
Operate the vehicle with the KEYLESS-GO key in the ignition
lock if necessary.
The KEYLESS-GO key has been detected inside the vehicle during
locking.
X
Remove the KEYLESS-GO key from the vehicle.
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.
At least one door is open. A warning tone also sounds.
X
Close all doors and lock the vehicle again.