This is the plug‑in 3 Series (BMW 330e in most markets): an electric motor paired with a petrol engine and an automatic gearbox. The high‑voltage battery sits under the boot so luggage space is reduced versus an estate, and real-world electric range depends a lot on how often you charge — check the car’s charging history and any remaining battery warranty. Also look for evidence of regular dealer/software updates and specific hybrid‑system servicing rather than assuming a standard petrol service is sufficient.

• Hybrid battery state‑of‑health report (ask for capacity/SOH and confirm any remaining BMW battery warranty).
• Plug/socket and charging cable condition; do a full charge and confirm the car accepts and holds charge and that EV mode engages smoothly.
• Automatic gearbox behaviour: check for smooth gear changes from cold and warm; listen for slip or harsh shifts and check service history for any transmission work.
• Boot underfloor and trims for signs of water ingress or repairs (battery location reduces luggage space and is vulnerable if the car has been flooded or heavily altered).
• Check infotainment/engine control software level and any open recall or update campaigns for the hybrid system.