2011 Chevrolet Volt Owner's Manual - Page 299

Climate Controls AUTO h (Auto Recirculation): Press to allow the system to automatically choose the air supply mode for best performance in terms of comfort, efficiency, and defogging. Air is recirculated or outside air is pulled into the vehicle. The touch screen button is lit. Pressing this button cancels automatic recirculation. Press AUTO or AUTO h to return to automatic operation; recirculation runs automatically as needed. Manual recirculation mode is not available when in Defrost or Defog modes. 8-7 h (Manual Recirculation): Press to alternate between recirculating air inside the vehicle or pulling in outside air. When selected, the touch screen button lights up to indicate that air is being recirculated. This helps to quickly cool the air inside the vehicle or prevent outside air and odors from entering. M / L (Manual Heated Seats): If available, the controls are on the center stack. To operate, the vehicle must be on. Press M or L to heat the driver or passenger seat cushion and seatback. For more information, see Heated Front Seats on page 3‑6. Press the touch screen L AUTO or M AUTO button. The button color will change to green when this feature is on. When the vehicle is on, this feature will automatically activate the heated seats at the level required by the vehicle's interior temperature. The active high, medium, low, or off heated seat level will be indicated by the manual heated seat button lights on the center stack. Use the touch screen buttons or the manual heated seat buttons on the center stack to turn auto heated seats off. For more information, see Heated Front Seats on page 3‑6. M AUTO/ L AUTO (Auto Heated Seats): If available, the controls are on the touch screen on the center stack.