Had an interesting experience with the R53 yesterday - key fob stopped working out of the blue - worked fine locking up the car, watched a hurling match and after the fob appeared dead. Very inconvenient!! Got home read about how the later R53's had a key fob with a rechargeable battery (done via induction while driving) but I reasoned it couldn't be that as it stopped all of a sudden with zero warning (at least I was hoping given a replacement key fob is ~€155). Then I read about resetting the fob with the alarm - tried it and it worked - can't understand how it 'unset' itself in the first place when the keys were sitting in my pocket during the match. Weird but at least an easy solution.