The 2025 Hyundai Tucson's Adaptive Cruise Control (ACC) system does not operate properly due to either a design flaw or a flawed implementation of the design. Hyundai's integration of Forward Attention Warning (FAW) with the ACC prohibits the driver from using ACC while wearing sunglasses. If one is driving the vehicle with ACC engaged and puts on sunglasses, the FAW flashes a warning on the dashboard and disengages the ACC. In order to engage cruise control the driver must interact with the onboard video display system to switch from ACC to "dumb cruise". Obviously the driver's attention is distracted while manipulating the selection of cruise control. The driver is also forced to compromise driving safety because they are forced to choose between wearing sunglasses and being able to use ACC. Use of ACC enhances safety especially when driving into the sun or in low visibility situations. The incompatibility of ACC with sunglasses wear then compromises safety. To make matters worse the FAW options screen provides erroneous information. It indicates that the driver can turn off FAW, but turning it off does not in fact turn it off. Turning it off stops the FAW warnings only until the driver turns on and engages ACC at which time ACC apparently forces FAW back on and active. I took the problem to my local Hyundai dealer who confirmed the problem and indicated they could not repair the problem. Since I am considering a Georgia Lemon Law claim, I asked whether I needed to bring the car back since the lemon law gives the dealer/manufacturer 3 tries to fix the problem. The dealer indicated that would be a waste of time because Hyundai will not support/allow the issue to be corrected. The dealer indicated this is a known issue. An Internet search also confirms that Hyundai's FAW + ACC integration is flawed. Additionally it is not clear whether other enhanced vehicle safety systems such as automatic emergency braking are compromised by the wearing of sunglasses?

- Seneca, SC, USA