Mercedes-Benz 2009 SLR McLaren Roadster Operator's Manual page 313

Problem
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During driving the red seat belt
telltale flashes and you addition-
ally 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's and passenger's seat belt are fastened,
or the vehicle is standing still and a door is
opened.
Possible cause/consequence
The vehicle's speed once exceeds 15 mph
(25 km/h) and you and/or your passenger
have forgotten to fasten your seat belts.
There are items placed on the passenger seat
and therefore the system senses the passen-
ger seat as being occupied.
Practical hints
What to do if ...
Suggested solution
Fasten your seat belts.
The seat belt telltale goes out and the
warning chime stops sounding.
Remove the items from the passenger
seat and put them in a safe place.
The seat belt telltale goes out and the
warning chime stops sounding.
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