Emergency Braking range
We visited 2 dealers yesterday. One was an incredibly knowledgeable sales person, the other was trying to fake it and got caught. When we went to the 2nd dealership, our intent was just to get to see some of the other colors we did not see at the first. No need for a second drive. But when the dealer made claims I did not believe, I asked him to take me for a drive and demo. I had him drive as I was not about to push the bounds of the Lane Deviation Warning or the Automatic Emergency Braking, I'd let him do that, especially if the car did not perform as he said it would (and I did not believe it would. In both cases, he was wrong. That leads me to a question for the experienced owners -
Two salespersons at the second dealership were having a strong debate on the range in which the Automatic Emergency Braking operates. The one that took me for a test drive did the following test to demonstrate the Smart Cruise and AEB: On a 4-lane road with cruise set to about 65 MPH as we approached a red light with cars stopped he wanted to show me the cruise would automatically slow down comfortably to about 10 MPH then disengage and the AEB would kick in. The former happened, then at 10 MPH the cruise did disengage but the AEB did not kick in. We would have rear ended the car in front if he had not hit the brakes.
The other salesperson was asserting that there was an initial speed range the vehicle has to be within when the AEB sees the impending rear-end collisions threat for it to kick in. He thought it was between 50 and 15 MPH. If the car is going faster or slower than that, AEB will ignore it because it is outside the programmed parameters (don't know the rationale). Since the Smart Cruise had command down to about 10 MPH, when it disengaged, the car presumed the drive was aware of the impending threat and it was below parameters so it did not kick in AEB. Had we not been on Smart Cruise and doing something like 50 MPH then AEB would have kicked in a brought the car to a stop. Then the other said it would have slowed the car but then disengaged and let the driver stop it, but AEB never brings the car to a stop.
A big benefit of AEB seems to be in city or stop and go traffic when folks ahead may slam on the brakes quickly or a light turns red and folks stop quickly. If AEB won't react and stop the car in those situations it seems defeat the purpose.
1 - will the AEB bring the car to a complete stop when it engages, or will it slow you then you lightly bump the car in front?
2 - Anyone know the truth on this AEB speed range theory and the co-mingling of AEB and Smart Cruise systems?
Future Ioniq Buyer