Received a Notice in December for my 2016 RRS TD6 of a required update to the EMS. Had the update performed today. It appears that the update potentially increases DEF consumption when the vehicle is under heavy load (aggressive acceleration or towing). There is a thread about this on the L405 forum. None I could find on our forum. Has any RRS TD6 owner had this update performed? Have you noticed an increase in DEF consumption? The dealer completely refilled the DEF tank and after a short drive the computer is indicating that I only have a 5,900 mile DEF range. After the last fill, it said 8,900. Not a big deal but certainly a potential inconvenience.