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Sudden Slow Down with Cruise Control
Today I made a long highway drive. The speed limit is 75mph, the car correctly noted the speed limit, and I set the adaptive cruise control at 75. I was not using autosteer.
Suddenly, for no apparent reason the car abruptly slowed. This really caught me by surprise. I glanced at the screen, it showed speed limit 35mph although there was no actual speed limit change on the road. What was much worse was that the setting on the ACC changed itself to 35mph! The deceleration was so fast that the car slowed to about 55 before I was able to act by accelerating and cranking the ACC setting back up to 75. Lucky there weren’t many cars on the road or this might have caused a bad accident.
I can’t fault the system for having an error in its speed limit files. But any cruise control should stay where I set it unless there is a slow car ahead or I make the change.
Is there some way I can stop this behavior so that the speed I set always remains until I change it? What it did today was scary and just plain dangerous. I’ll have a hard time trusting this basic system in the future.