Check the battery charge state and have it load tested, when Mini's batteries start to die or loose charge they will do rather odd things. My R50 wasn't driven for a while and I kept hearing a radio over several days when I was outside. found they battery had discharged to the point where is was almost 100% flat and they radio would come on at random times. Solution was to place the battery on a trickle charge over 3 days to full cycle the battery and have had no issues since. Due to the ECU etc there will always be a parasitic drain on the battery so they will never hold a charge over lengthy periods of non use or if only ever driven short distances. If lack of use is not the cause of discharge, you most likely have an aging battery that is due for replacement and be aware that your model Mini may need to have the Battery reset to the ECU so it knows that it has a new battery and this enables it to correctly charge the new battery, failure to do a battery reset can and will damage the new battery and reduce its lifespan. Also be mindful that a jumpstart and long drive will not correctly recharge a battery, hence the need to trickle charge for a min of 24 hrs or longer.
One other thing to consider is a footwell control module that can be faulty or water damaged, a club member here on his R56 had a module under the drivers seat go bad (right hand driver).
Last edited by Milpol; Oct 23rd, 2016 at 06:55 AM.