NHTSA Complaint #11504505 — 2017 VOLKSWAGEN TOUAREG

While using Adaptive Cruise Control, vehicle intermittently displays "ACC not available" cruise control completely disengages and does not allow for traditional cruise control functions. Typically ACC begins to function again after about 5 mins or by powering off and powering on vehicle. Vehicle has never been in an accident. All incidents occur in Southern California. Situation when it disengages can pose safety risk to due sudden loss of propulsion while keeping up with traffic, especially frightening when driving at an incline, i.e. Grapevine. Message is intermittent and can turn on 10 minutes into a drive or two hours into a drive. Unable to show dealer message. No advanced notice of ACC failing or issue with vehicle. Vehicle has had all maintenance done with dealer. No modifications to any component.