Mine lasted almost a month so I'm guessing it's a small leak. If it's any consolation, my runabout is a bomb proof 2010 Mercedes and that has only ever developed 1 problem - leaking Aircon!
I've finished the Alfa mechanically, just waiting paint and now trying to fix a long list of electrical problems - most of which seem very common!
No lights on the Speedo.
Fuel gauge goes on and off at a whim.
Interior fan goes on and off at a whim. (linked to coolant leak?)
Passenger side rear window switch not working (OK from drivers switch pack)
Passenger rear courtesy light not working (new bulb fitted)
Boot light not working (new bulb fitting)
I'm wondering if all the issues down the passenger side (and boot lamp) could be due to a single shared earth that's loose?
I've literally checked every single fuse in the car (glovebox, driver's side, engine bay). Driving me bonkers.
Still a giggle to drive though