I was driving on the highway at 60mph on a 4 month old 2025 Porsche Macan Ev 4S. I turned off the AC for both driver and passenger. I suddenly started seeing increasingly larger clouds of black smoke coming out of the passenger side of the cabin, and a clear and increasing smell of something burning. I had to roll down my windows because of the smoke. The cabin filled with black smoke. I tried different things to see if something was broken, and as part of my troubleshooting I turned the AC back on. That got the smoke to clear. There was no warning indicator, no message and no service required indicator on my dash. I did not receive any recall notices. I brought the car in to the Porsche Bellevue Service Center to get it serviced. The service attendant insisted that as the car was not reproducing the issue at that exact moment there was nothing they could do more than a visual inspection. I insisted and they agreed to investigate. They found an active Porsche bulletin for my vehicle, SY 828055 'Smoke and or a burnt odor from vents in the passenger compartment'. The service center did replace the passenger ac unit and this has not happened since. The attendant was clearly not trained on these bulletins as they kept denying anything could possibly be wrong with the car telling me 'we can't just take your car apart for a problem that happened once'. When this was in fact what needed to happen. A electric car that's 4 months old catching fire at 60mph on the highway is not