My wife left a gallon of vinegar on the passenger seat, cap side down, some leaked out, and now I am having some interesting issues.

The fuel gauge and computer show I am empty.

Have a seatbelt warning light on center instrumentation as well as what appears to be a airbag warning light.

Oh and the battery was mostly dead, but that could be from her leaving the headlights on 5 days ago and not getting a good enough charge back on the battery.

What is under the front passenger seat in an R56, electronics wise?

 

There are two modules: The heating module (if you have heated seats) and the occupancy sensor.

 

Ok...all is well again. Come morning time all was sorted out. Don't have heated seats but passenger sensor explains why seatbelt light was on. As it turns out there was very little vinegar spilled, but still think it may have cause at least one of the issues. Never know, Mini's do weird things when the juice runs low.