Hi guys   Recently had cruise fitted by Porsche Cardiff and, ever since, whenever I fill up the car only gets just over the 3/4 mark.  It never hits full.  I've had two fill ups and both were 47 litres on the light; it was definitely brimmed on both occasions.    The battery was disconnected by them as I lost all of my saved radio channels.  Has the car somehow lost its fuel level calibration?  I've rung them today but nobody has gotten back to me yet.  They've probably had e