my vehicle has a safety issue that is tied to the NAV system and its interaction with the vehicles drivers assist functions. Multiple times while driving the vehicle, the NAV system would decide the vehicle was on a different road than it was actually on. The first time it happened; I was on the freeway traveling at 70 MPH when the NAV system decided I was on a residential street several miles away with a 25 MPH speed limit. The vehicle immediately adjusted to what it thought was the posted speed. To be more specific, the vehicle slammed on the brakes and went from 70 MPH to 25 MPH quite aggressively. Luckily, no one slammed into me as I regained control of the vehicle. This has happened multiple times on different roads, different speeds, with or without using the NAV system for guidance. I have found that turning off all of the drivers assist functions stops the vehicle from slamming on the brakes but the NAV system still occasionally goes nuts. I have taken the vehicle to the dealership 3 separate times with no joy. The dealership has been unable to duplicate the defect to date however the last time in I was able to provide video evidence of the issue. The dealership did provide me (on 14 April this year) a copy of an older memo from Volkswagen identifying a potential NAV issue. According to the memo the issue should have been taken care of by Aug 2024. My issue extends well beyond that date. Of concern to me is the fact VW knew there was an issue but failed to tell the consumer to turn off the Adaptive Cruise Controls functions until this issue was fixed. As my vehicle still has the issue, I don't know if it's related to the memo or something different. I've attached the last 2 workorders, vehicle is still at dealership for 3rd time. I also attached the document I provided the service writer the first time I dropped the vehicle off. Also attached is the VW memo on the NAV system

- Deer Park, WA, USA

I was driving south in an 80-mph zone on [XXX] between Brookings and Sioux Falls. I had my cruise control set to 82 and had just completed a lane change after passing a semi truck. With no change in the speed limit, the car shifted the set MPH to 30mph and engaged the braking system sharply. I was able to override by pushing the gas, but the mph setting was still set. The experience was a more extreme event than other similar instances I-??ve had (e.g., car shifting from a 30mph to 15 because of a school zone but not school hours so sign not relevant) because of the speed, proximity to other cars, and the absence of a change in speed indicator. I believe this glitch is a major concern for safety and appreciate your time in reviewing my concerns. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Sioux Falls, SD, USA

Multiple occasions the start/stop malfunction has turned on. The brakes grind and screech horribly and I-??ll get breaking malfunction warning. It has been checked by vw and they state that the brakes are fine and they-??ve had several come in with same issue but there-??s no recall that has been issued. They stated it is the material that was used to manufacture brake parts that cause this problem. It worries me one day they will give out. Also the error drive system has come on and it feels I lose power. I stop car and sometimes that helps as I restart. They tell me the antifreeze needs to be topped off. I-??ve already had to refill in less than 3 months which I find crazy with antifreeze. No other car I-??ve owned have I had to refill this so much. So several issues have occurred with this vehicle.

- El Paso, TX, USA

When pushing the gas car will not accelerate then they-??ll be like a big -??clunk-?? like it-??s not into gear and then the car will slow slowly accelerate then it-??ll shoot off. Also my screen goes crazy like something electrical is happening.

- Brooklyn, MD, USA

Vehicle had multiple engine malfunction lights appear and start/stop failures. Vehicle failed to start properly and speed was limited to prevent damage engine. Happened while I was driving it and I had to pull over and had the vehicle towed. An authorized dealer, Auto Import Inc in Brainerd, MN has had the vehicle since July 29th. They are unable to diagnose the problem, want to send the vehicle elsewhere and VW quality technicians have not shown up to inspect the vehicle. I had noticed prior to the engine failure that my fuel economy was not going down with driving, but rather up, which made me suspicious. Stop and go City driving should not increase fuel economy in the manner which it was. I became nervous about fuel amounts. My last three fill ups were about 6 gallons only after driving 250 miles, equating to 40 mpg, which is way higher than any reported mpg estimate I have a customer care rep and case with VW. They are not helping me at all.

- Elk Grove Village, IL, USA

The engine failed flashing a warning sign of rpm max 4000 from day 1 of me having the car. It is available for inspection. During the multiple times this has happened the car will come to a hault while driving on busy expressways of at least 70 mph. The dealer has not found a solution to the problem after at least 4 attempts.

- Sauk Village, IL, USA