Skoda Superb 2005 Owner's Manual page 39

38 Instruments and Indicator/Warning Lights
Caution

If the warning light comes on when driving and in addition the warning
light  (cooling system fault) also comes on in display, you must then
stop the car immediately and switch the engine off - risk of engine
damage!

Seat belt warning light

The warning light comes on for a few seconds after the ignition is
switched on as a reminder to fasten the seat belt.
If you do not fasten the seat belt, a long warning signal sounds for 6
seconds.
For further information on the seat belts ⇒ page 155.
The following text will be displayed in the information display*:
FASTEN SEATBELT
For further information on the seat belts ⇒ page 155, "Seat belts".