In the 18 months that i've had my MY11 125 Elegance Combi, i've done about 35000km. Got it with 95k on it.
Was and still is serviced on the money and never had any trouble. Tyres and brakes done and the electric tailgate servos have failed. That was the biggest killer.

Byron to Bris trips see around 4.3 litres per 100 (according to MFD) and when i Uber up here in Byron, MFD usually says between 5 and 6 litres per 100km.

Just love the mid range of these things. Gets regular 'speed runs' so i doubt that DPF will ever be a problem and my regular scans never show anything.
I think it could be time for a Hardings 'service' Those extra torques sound like fun but you don't really need them.

Personally, i'm a diesel fan now but i think as long as the vehicle you choose has a thorough and timely service history, you won't go wrong.