Hi all, my son has bought an XF, love it! But he was away for 4 weeks. On his return the battery was flat. He got it jump started and went to Kwik fit where they put in a new battery and "reset" it. Our query is that, several times since then, the start/stop activates at the lights once he takes his foot off his brake pedal it goes into park and turns off! Any ideas how to stop this please??