Based on the search results, driving with a cracked headlight cover is generally not illegal by itself. However, it can easily lead to a ticket if the crack causes specific safety issues.
The Main Concern: Safety and Legal Consequences
The primary reason a cracked headlight can be deemed illegal is that it often violates laws requiring vehicles to have properly maintained and safe equipment.
It's About Safety: A crack in the headlight cover can scatter the light beam. This creates glare for oncoming drivers, temporarily blinding them and increasing the risk of an accident.
Specific Conditions for Failure: North Carolina's vehicle equipment regulations state that a headlight shall not be approved if "any lens or reflector is cracked, broken, discolored, or missing" . However, it adds a key detail: "Cracks on lenses shall not lead to disapproval unless water is likely to short out the bulb" . This means the crack itself isn't automatically a violation; it becomes one if moisture can enter and damage the bulb.
Broader Legal Grounds: You can be fined for driving a vehicle that is "in such unsafe condition as to endanger any person" or that is not properly equipped as required by law. A cracked headlight that creates glare or reduces your visibility at night would fall under this category.
What This Means for Your
Audi A6 C6
Given the potential for safety issues and legal penalties, it is highly recommended to replace a cracked headlight assembly. When looking for a replacement, especially for a specific model like your Audi A6 C6, you should ensure the new part complies with regulations.
Choose Compliant Parts: Whether you choose
Audi sport accessories or other aftermarket parts, make sure any
sport headlights or replacement headlight assembly is certified for road use. In the US, this typically means they must comply with Federal Motor Vehicle Safety Standard No. 108.
Avoid Illegal Modifications: Remember that externally modifying your vehicle's lighting equipment is often not permitted. The national safety standard, GB7258, explicitly states that "users should not modify external lighting and signal devices".
Recommended Action
To avoid a potential fine and, more importantly, to ensure your safety and the safety of others on the road, you should plan to replace the cracked
headlight assembly on your Audi A6 C6 as soon as possible.
I hope this information helps you make a safe and informed decision.