281 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
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DRIVER’S SEAT BELT
FASTEN SEAT BELT!
The display reminds you to fasten the 
seat belt.
Fasten the seat belts.
FR. PASS. SEAT BELT
FASTEN SEAT BELT!
The display reminds you and your 
passengers to fasten seat belts.
Fasten the seat belts.
SEAT BELT SYSTEM
DRIVE TO WORKSHOP!
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz 
Center as soon as possible.
K
CLOSE
SUNROOF!
You have opened the driver‘s door with 
the SmartKey removed from the starter 
switch and the sliding/pop-up roof open.
Close the sliding/pop up roof 
(page 190).
J
CLOSE
SUNROOF!
You have opened the driver‘s door with 
the SmartKey removed from the starter 
switch and the sliding/pop-up roof open.
Close the sliding/pop up roof 
(page 190).