A quick query in case anyone has experienced. I had my T6 in for a service and they said they would top up the AdBlue. When it came back the AdBlue message on the display was saying a range of 6500 miles. I thought this odd as it’s normally about 4-4500 miles when filled up. I‘ve driven about 500 miles since and the message hasn’t changed and now the yellow engine management light has come on. I also got a message at same time saying “Start-Stop system fault”. No loss of power etc but concerning. Has anyone had this experience or heard of it? Thanks in advance for any input.