I drive a manual Honda City with cruise control. I've noticed that if I press
+ three times, the speed increases by 5 km/h. Pressing
- three times also decreases the speed by 5 km/h. This is very close to 3 miles per hour (4.828032 km/h). Six times is ±10 km/h, and so on, although it doesn't always sit exactly on multiples of 10 when I get to that speed.
When I get to 100 km/h the speed (as measured by a GPS app) is usually either 99 km/h or 101 km/h when I'm using cruise control. I.e. if it's 99 and I press
+ it becomes 101, 101 and
- becomes 99. Of course the speed varies slightly for hills, etc. so it can sometimes go slightly above or below before correcting itself.
Does the cruise control actually adjust in miles even though the speedometer measures in km/h?