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Adaptive Cruise Control

  • 2014
  • Cayenne Diesel
44 000
Mission Viejo, 

I been experiencing problems with the ACC on this vehicle since purchased new in 2014.  Problem: the ACC when engaged will suddenly and unexplicably brake (hard, like brake checking). This typically occurs on extended drives with light to no traffic. I have taken to 2 different Porsche Dealer Service Centers, both indicate they can find no faults showing in the computer. The wiring to the ACC has been checked and resealed, but to no avail. Has anyone else experinced this? If so, has it been resolved? How?

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