The garage took 1 litre out, which brought the level to just over 50%. I then added 100ml and the gauge never moved. Adding another 150ml it suddenly jumped to the top level marker and I since have driven 1000 miles with no repeat of the overfill warning.Just curious, did the overfill warning came back or has settled down?
It must have been overfilled during the service as I still have •75 ltr in a bottle in the van for future top ups .