This is the first‑generation GLA (X156) sold as a compact premium crossover — petrol engines are turbocharged and generally smoother and quieter than diesels but won’t match diesel fuel economy for long motorway runs. 'Automatic' on GLA models can be a dual‑clutch or torque‑converter gearbox depending on engine; both need a documented service history for the transmission (fluid/pack changes at recommended intervals) and can be costly to repair if neglected. Parts are widely available in Ireland through Mercedes dealers and independent specialists, but labour and genuine parts cost more than mainstream brands.

• Automatic gearbox behaviour — test for smooth, prompt shifts and confirm gearbox fluid/service history (DCT types show hesitation/shudder if overdue).
• Signs of oil leaks around turbo/valve cover and check for excessive oil consumption on higher‑mileage petrol engines.
• Front suspension and steering — listen for knocking from lower wishbones/anti‑roll bar links and check for uneven tyre wear.
• Electrics and comfort features — confirm parking sensors, camera, climate controls and panoramic sunroof drains (if fitted) operate without fault or water ingress.
• Body and underside corrosion around wheelarches, sills and tailgate hinge points — inspect beneath wheel liners and boot seam for rust or previous repair work.