Cupra Leons are the sporty, higher-spec versions of the SEAT/Leon range; a diesel automatic is aimed at high-mileage buyers rather than noise-and-flare enthusiasts. If this really is a 2025 diesel Cupra, check whether the car is a true Cupra trim or a well-equipped Leon with Cupra badging — the suspension, wheels and brakes will be firmer and more expensive to replace. Also expect diesel-specific items: DPF and AdBlue systems and an automatic (likely DSG-type) gearbox that benefits from correct service intervals and software updates.

• DPF behaviour — look for recent regeneration events and check for excessive soot smell/smoking after a drive (short-trip use can clog the DPF).
• Automatic gearbox/DSG shifting — verify recent transmission software updates and listen for hesitation or harsh up/down shifts during a warm test drive.
• AdBlue system — filler cap and dosing operation, plus any warning lights; confirm the AdBlue filler is present and accessible.
• Tyres, wheels and suspension — Cupra models often have larger wheels and firmer suspension; check for uneven tyre wear, scuffed alloys and a harsh or rattly ride.
• Boot and tailgate seals/floor — as an estate, inspect the load area for scuffs, water ingress around seals and correct tailgate operation.