Mercedes-Benz GL450 Operator's Manual page 438

Problem
<
The red seat belt telltale comes
on for a maximum of 6 seconds
after starting the engine.
<
You hear a warning chime for a
maximum of 6 seconds after
starting the engine.
Possible cause/consequence
The seat belt telltale reminds you and your
passengers to fasten your seat belts before
driving off.
You have forgotten to fasten your seat belt.
Practical hints
What to do if ...
Suggested solution
Fasten your seat belts.
Regardless of whether the seat belts
are fastened or not, the seat belt tell-
tale always comes on and remains lit
for 6 seconds after starting the
engine.
Fasten your seat belts.
The warning chime stops sounding.
437