The 2017 CLA is the compact four-door coupé variant of Mercedes’ small executive range; petrol models are usually 1.6–2.0 turbo engines paired to a 7-speed automatic (either a dual-clutch 7G‑DCT or Mercedes’ torque‑converter 7G) so confirm which gearbox this car has. Expect sportier styling and a refined interior but tighter rear headroom and a smaller boot than a C‑Class; servicing and dealer diagnostics cost more than mainstream brands.

• Automatic gearbox behaviour: test for smooth shifts, hesitation or judder and ask for gearbox fluid / dual-clutch service history (some units need occasional mechatronics/flush work).
• Engine oil use and turbo health: watch for blue smoke on start, whistling from the turbo, or high oil consumption which are common check points on 9‑year petrol turbos.
• Rear seat headroom and boot usability: confirm rear passengers fit comfortably and check for worn boot floor, seatback scuffs and tight access due to the coupé roofline.
• Suspension and steering noise: listen for knocks from front wishbones/track-rod ends and rear suspension bushes which can show wear on older sporty setups.
• Electrical/information systems: verify infotainment, reversing camera/sensors, heated seats and steering-wheel controls all work (electrics can be the source of intermittent faults).