What Causes ACC To Cancel Itself? - 2012 Audi A8 Long-Term Road Test
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2012 Audi A8 Long Term Road Test

2012 Audi A8L: What Causes ACC To Cancel Itself?

June 12, 2012

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While I was driving the 2012 Audi A8L back from Paso Robles this weekend, during one of the rare moments when I actually used the adaptive cruise control, the above message popped up and shut off the cruise. When I pressed the button to resume the cruising speed, this message just appeared again. Eventually it cleared up on its own and I was able to engage ACC again. But then many miles later it popped up and turned off cruise again.

By the time I returned home, the car's cruise was working fine. But I wonder what could have caused the issue in the first place. Maybe something flew in front of the sensor? Any ideas?

By the way, for those who don't know what a braking guard is, it's a safety function that alerts the driver of the risk of a collision. First, it emits a warning tone and then issues a warning jolt like a wake-up shake. Thing is, the brake guard stays on even when you're not using ACC. So whatever caused the above warning turned both off.

Caroline Pardilla, Deputy Managing Editor


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