Rear suspension too low

Hello, does this car have air suspension?

Okay, I see it does, there is probably a leak in the rear of the system. These set ups can be tough to find a leak. But they are usually at the airbag that lifts the car on each side. There is a valve that balances out each side, front and rear, so if you have a leak on either side it will effect both sides. If you have the means, the lines are inside each wheel well. The wheel well comes out and the balance valve and lines are visible. They have cheap plastic lines but it's usually the bag that leaks. And most of the time the whole system shuts down if there's a leak. I'm surprised the front isn't sagging as well. Are there any warning lights on the dash board?