I have COMAND fitted on my S205 (2015) - software is up to date, map is on the latest version and also set to 'fastest' route mode.....yet it's started doing odd things over the past week like trying to avoid toll roads (specifically Dartford bridge/tunnel) and also seemingly not selecting the fastest route, and doggedly sticking to the set route, but then when it finally re-calcs (to the route I want to follow instead) it comes back with the better route i.e. faster or shorter. I've tried switching between route modes fastest and dynamic (to no avail) and also looked at toll-road options but can't actually see how you can positively enable toll-routes. Any suggestions, please?