Mercedes-Benz M-Class 2015 Owners Manual - Manual (Page 320)

Display messages Possible causes/consequences and M M Solutions
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 182).
X
Operate the vehicle with the SmartKey in the ignition lock.
Â
Key Not Detected Key Not Detected
(white display mes-
sage)
The KEYLESS-GO key cannot be detected at present.
X Change the location of the SmartKey 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.
Â
Remove Remove 'Start' 'Start' But‐ But‐
ton and Insert Key ton and Insert Key
KEYLESS-GO is temporarily malfunctioning or is defective. A warn-
ing tone also sounds.
X
Insert the SmartKey into the ignition lock and turn it to the
desired position.
X Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
Safety
Seat belts
Problem Possible causes/consequences and M M Solutions
ü
After starting the
engine, the red seat
belt warning lamp lights
up for 6 seconds.
The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.
X Fasten your seat belt (
Y
page 48).
ü
After starting the
engine, the red seat
belt warning lamp lights
up. In addition, a warn-
ing tone sounds for up
to 6 seconds.
The driver's seat belt is not fastened.
X
Fasten your seat belt (
Y
page 48).
The warning tone ceases.
318
Warning and indicator lamps in the instrument cluster
On
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