The S54 received a double-VANOS rebuild, valve adjustment, connecting-rod bearing replacement, engine mounts, and related seals and belts in December 2025. A factory-specification exhaust was installed in 2024, replacing an aftermarket system, and the air-conditioning refrigerant was recharged in September 2024. It remained in North Carolina from new until March 2023, when it was purchased on BaT and relocated to California.