Mercedes-Benz C-Class, Owner'S Manual

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Display messages
Possible causes/consequences and M M Solutions
Because there is interference from a strong source of radio waves,
the key 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 to prevent it from rolling away (
Y
page 207).
X
Operate the vehicle with the key in the ignition lock if necessary.
Â
Remove starting Remove starting
button, then button, then
insert key insert key
The key is continually undetected.
The key detection function has a temporary malfunction or is
faulty. A warning tone also sounds.
X
Insert the key 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
Warning/
indicator
lamp
N N Signal type
Possible causes/consequences and M M Solutions
ü N Only for certain countries: the red seat belt warning lamp lights up for
6 seconds after the engine starts.
The seat belt warning lamp reminds the driver and front passenger to fasten
their seat belts.
X
Fasten your seat belt (
Y
page 49).
ü N Only for certain countries: the red seat belt warning lamp lights up after the
engine starts. In addition, a warning tone sounds for up to 6 seconds.
The driver's seat belt is not fastened.
X
Fasten your seat belt (
Y
page 49).
The warning tone ceases.
Warning and indicator lamps in the instrument cluster
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