This is the Mk4 SEAT Leon (MQB platform) in diesel/manual form — commonly fitted with 1.6 or 2.0 TDI engines. Later-diesel Leon examples often use DPF and, on some 2.0 TDI variants, SCR/AdBlue hardware; those systems dislike lots of short, stop-start trips. Parts and independent servicing are straightforward in Ireland because SEAT shares many components with VW/Skoda.

• Clutch and gearbox feel — check for slipping, a high bite point or crunching when engaging gears (manuals at 5 years often show wear).
• DPF and regeneration history — ask whether the car has mainly motorway miles (healthy) or short urban use which can cause blockages and expensive cleaning.
• EGR/intake carbon and turbo hoses — check for sluggish turbo spool, rattles or visible oil in intercooler hoses which indicate soot/oil issues.
• AdBlue system (if fitted) — confirm filler access, dosing warning lights and that there are no active SCR fault codes.
• Timing belt/cam service interval and last change date — confirm the belt/chain arrangement and when the next service/major service is due.