Can anyone help me !! my 2014.5 S60 T5 has developed a problem in that the stop/start mechanism works one day and not the next. I have had the dealer complete a service on the transmission, replacing AF, also replacing the AT oil cooler that had developed a crack and was leaking a minor amount of fluid into the auto fluid. However the issue with the start/stop is driving me mad. When it is not working and I come to a stop, about 3 seconds after the stop there appears to be a slight thud as if the transmission is confused or is playing catch up.
Can someone explain what is happening and how to fix it - PLEASE