Could be a bad battery which could have been stressed by drivers behavior. If your wife drives many short trips while utilizing the seat heaters, steering wheel heater defroster, you drain enormous amounts of power from the car. If you don't drive long enough or at a decent speed, your car will never really charge the battery. I should know, I went through 3 batteries in 2 years due to the 2 mile commute. The dealership gave me a BMW charger to help the issue. In the winter, I charge the battery for about 12-24 hours every 1-2 weeks. If I don't do this I am guaranteed a battery discharge warning. It really sucks but that is the price I am willing to pay for the x5.
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17 M3 ZCP -- 2017 Range Rover Sport SC
--RIP--
12 X5 50i Sport -- 11 M3 DCT -- 2011 X5 50i(Lemon) -- 2008 550 Msport -- 2007 x5 4.8 sport -- 2004 545 sport -- 2002 x5 4.4 sport -- 2001 540i Msport 2000 SL500 -- 1997 SL500
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