How do you replace a headlight lens on a 2004 Volvo S80?

To replace a headlight lens on a 2004 Volvo S80, start by opening the hood and removing the screws or bolts securing the headlight assembly. Carefully detach the assembly from the vehicle and disconnect the wiring harness. Replace the lens by either removing the old lens and securing the new one, or replacing the entire headlight assembly if needed. Finally, reconnect the wiring harness, reattach the assembly, and secure it with screws or bolts.