Hi my RRS 2013 L320 had a strange coolant tank issue.I replaced the coolant tank about a year ago as I was getting the low coolant error.So today driving it came on but did not go off at all unlike the previous coolant tank the message was random.Anyway thinking ok here goes another coolant tank to order I thought let’s try something so when I pulled at home I left the engine running and decided to unscrew the bleed screw on top of tank .Anyway as I unscrewed it I hear it bleed of some air so after that I fastened the bleed screw back up.I got back in car closed the door and the warning message had gone !!!! Weird never even thought it would work so anyway I plan to bleed the coolant system at weekend make sure it’s all ok and b9 air trapped.Has anyone experienced this before ?