Been playing with the speed warnings on my A3, and am a tad confused.
Lets call the warnings S1 and S2 for brevity. If I set S1 to, say,
50mph whilst driving at that speed, then the warning doesn't seem to
trigger until I'm doing over 55mph(ish). The warning will then not
clear until I drop below 50mph. I can understand the need for a 1 or
2mph difference between the "trigger" and "disable" points, to avoid
constant on/off conditions whilst driving around the set speed, but
5mph!? If I set the speed warning at 50mph, then I want to know when I
exceed that speed, not when I exceed 55! Is this normal or do I have a
problem with mine?
S2 exhibits similar behaviour, but if I set this to, say, 80mph, then I
seem to have to do around 90mph to trigger it!
My first reaction was that the DIS system was using the correct road
speed, and the speedo was over-reading, as many of them do, but then the
system should set the warning at whatever speed I'm doing, regardless of
whether the speedo is accurate or not.