When driving a vehicle in a tunnel and the vehicle breaks down and in consequence of which the vehicle cannot move:
Neither the driver nor the passengers shall smoke or manipulate an open flame. If a separate heating unit is used for heating the broken-down vehicle, it must be switched off in the tunnel.
The driver need not mark the vehicle as a traffic obstacle.
The driver and passengers of the broken-down vehicle may stay in the vehicle if the break-down has been reported to the Police or to the tunnel supervisor.