Team,

I got a similar problem today, I was driving normally and sudenly the ESP/BAS and ABS lights come on, I felt like the car stopping, then I turn off the car, and was not able to turn it on again until the 4th try, I continue driving the lights come on again, I down the windows and parked the car, then I start checking the fuses (all ok) and notice that the spoiler light was blinking, with the key on the ignition position I was not able to close the windows neither to put the spoiler down, when try to start the car was not able, then I check the battery voltage and was 8 volts, I change the battery for one that I have on my other car, and the XF worked ok, everything goes normal, spoiler light stop blinking, I drove the car for about 20 minutes, turn it off, when I started again the battery light come on, and then the ESP/BAS & ABS again, also the spoiler light start blinking again, I turn off the AC, but this time I did not down the windows, I parked the car at home, check the battery voltage and was ok (12V), but was not able to start the car again. If you have any suggestion please let me know.

Cheers.