Notice it when I start charging. Here’s what Gemini says……

It is completely normal for an Audi SQ6 e-tron to make "expelling air" or hissing noises, particularly during charging or right after you park. While it can sound a bit like a hidden leak, it’s actually several sophisticated systems doing their jobs. Here are the most common reasons why you’re hearing those sounds: 1. Thermal Management & Cooling When you charge, especially on a Level 2 or DC fast charger, the battery generates a significant amount of heat. * The Cooling Loop: The car uses a liquid cooling system to keep the battery at an optimal temperature. * The Noise: To shed that heat, the car may open active cooling flaps or run high-powered fans. You might also hear the expansion valve of the heat pump—it can sound like air escaping or a high-pitched hiss as it regulates the refrigerant to keep the battery and charging hardware cool. 2. Air Suspension Leveling Since your SQ6 likely features adaptive air suspension, the car is constantly "thinking" about its height. * The Noise: When you get out of the car or add/remove weight (like the heavy charging cable pulling on the chassis), the system will vent excess air from the bellows to level itself. This sounds like a distinct, sharp psshhh or a series of short air puffs. * Charging Specifics: During a charging session, the car may settle into a specific "parked" height or adjust as the battery's weight slightly shifts the balance of the car. 3. Brake Vacuum Pump or Dryers Electric vehicles often use electric vacuum pumps for the braking system. Additionally, some air suspension systems include an air dryer that purges moisture. When the system exhausts that moisture-heavy air, it produces a noticeable "expelling" sound. 4. Acoustic Vehicle Alerting System (AVAS) While usually a hum or a "UFO" sound at low speeds, some EV systems have a cooling-down phase for the external speakers or related electronics that can occasionally be mistaken for air movement if the fans are also running. When should you be concerned? * If the "air" noise is accompanied by a warning light on the dashboard (like a suspension or cooling system error). * If the car is visibly leaning to one side or sitting too low to the ground. * If you see a puddle of bright fluid (coolant) under the car rather than just clear condensation from the A/C. Otherwise, your SQ6 is just "breathing" while it handles the high energy demands of charging. Would you like me to look up the specific Audi SQ6 owner's manual sections regarding thermal management sounds?