Which of the control lights visible in the illustration indicates that the safety seat belts are not fastened?

The correct answer is B. This red warning light with a pictogram of a passenger and a seat belt clearly indicates that the driver or a passenger has not fastened their seat belt. In accordance with Art. 39 para. 1 of the Road Traffic Act, using seat belts is mandatory. The other warning lights indicate: A – a fault in the braking system or the parking brake is engaged, C – a fault in the ABS system.