TYC 18-5894-01 Mercury Grand Marquis Driver Side Replacement Corner/Side Marker Lamp Assembly OE-comparable harness (no 'pigtail' connector) for hassle-free installation OE-comparable mounting provisions ensure drop-in precise fitment Special coating on the lens surface prevents hazing and fading, ensuring proper illumination and operational safety Meet or exceed DOT/SAE standards, with particular consideration for photometric and safety compliance Rigorous and accelerated cycling tests to ensure product service quality and durability