Key legal question
Whether the seat-belt clamp arrangement complied with Art. 3a para. 1 OCR
Extracted holding
No. Drivers must wear the existing seat belt and may not alter it so that its protective function is undermined; the recourante's loose adjustment made the belt ineffective.
Extracted reasoning
The factual findings showed excessive slack: her head struck the mirror about 30 cm away, demonstrating that the belt was too loose and no longer performed its intended safety role.