Key Details: Mileage: 126,000. Engine: 3.0L twin-turbo diesel (N57). Power: Tuned to 380bhp / 600lb-ft by Darkside Developments. Transmission: 8-speed ZF automatic. Location: West Sussex. Performance & Reliability Upgrades: DPF gutted (casing still intact for visual inspections). EGR and swirl flap delete. Fully mapped out in software during professional tune. Tuned at Darkside Developments (dyno printout included). Delivers serious power with improved long-term reliability. Timing chain replaced around 110,000 miles, a known weak point on these engines. (Includes photo and video evidence of the work). Rare Spec & Factory Options: M Sport Package. M Sport suspension. M Aerodynamics package. M leather steering wheel. Sports seats (Dakota Oyster leather). Carbon Black metallic paint. Interior mirror with auto-dimming. Smoker package (unused). Headlight cleaning system. Park Distance Control (PDC). Adaptive xenon headlights. Tech & Comfort Highlights: Navigation System Professional (updated for 2025). Logic 7 Surround Sound System - an outstanding audio setup (very rare and sought after). Dual-zone auto air conditioning. Heated front seats. Full service history - serviced every 10k miles or less. Mechanically excellent, always maintained with no expense spared. Condition: Overall good condition for age/mileage. Minor cosmetic age-related marks only. Drives flawlessly - smooth, powerful, and reliable. Extras Included: Receipts, dyno printout, and timing chain documentation (photo + video). Two keys. V5 present. Reason for Sale: Going to university and unfortunately need to free up funds. No part exchange. Serious buyers only please - this is a genuinely well-sorted 535d that's been enthusiast-owned and maintained to a high standard.