Just noting some things I've come across:
There appears to be no reason to have separate buttons for flashing high beams and toggling high beams as you cannot flash at night and you cannot toggle during the day. Either that, or you cannot flash on tracks where it might become night, and can't toggle where it won't. Not sure now, but it's definitely an either/or and you can never do both, so either way having the option of using separate buttons is redundant. My next re-map will go back to the "dual-use" version.
Also, there is no actual reason to have a button for wipers unless you like to run them for comedic/aesthetic effect, since they come on automatically when it starts to rain and then you cannot turn them off until it stops... when they will stop automatically.
Sometimes this game makes no sense... ok a lot of the time.