Is it permitted to drive an un-roadworthy vehicle?

1. Yes, if the malfunction doesn’t involve the vehicle’s brake system
2. Correct answer: It is forbidden to drive an un-roadworthy vehicle that cannot be fully controlled
3. Yes, if the malfunction involves the vehicle’s lighting system only
4. Yes, if the malfunction involves the vehicle’s steering system only

WhyDriving an unroadworthy vehicle that you can't fully control is prohibited, whichever system is broken.