Mercedes-Benz 2009 C-Class Operator's Manual page 343

Problem
< The red seat belt telltale
comes on while the vehicle
is standing still and the
engine is running or during
driving.
< During driving the red seat
belt telltale flashes and
you additionally hear an
intermittent warning
chime with increasing
intensity.
i After 60 seconds with an unfastened seat belt the warning chime stops sounding and the seat belt telltale illuminates continuously. The
seat belt telltale will only go out if both, the driver and front passenger's seat belt are fastened, or the vehicle is standing still and a front
door is opened.
Possible cause/consequence
You and/or your front passenger
have forgotten to fasten your seat
belts.
There are items placed on the
front passenger seat and
therefore the system senses the
front passenger seat as being
occupied.
The vehicle's speed once
exceeded 15 mph (25 km/h) and
you and/or your front passenger
have forgotten to fasten your seat
belts.
There are items placed on the
front passenger seat and
therefore the system senses the
front passenger seat as being
occupied.
Suggested solutions
X
Fasten your seat belts.
The seat belt telltale goes out.
X
Remove the items from the front passenger seat and put them in
a safe place.
The seat belt telltale goes out.
X
Fasten your seat belts.
The seat belt telltale goes out and the warning chime stops
sounding.
X
Remove the items from the front passenger seat and put them in
a safe place.
The seat belt telltale goes out and the warning chime stops
sounding.
Practical hints
What to do if ...
Z
341