Howdy!
If your car has air suspension, then you not only see the ride height selector/mode in the CAR menu immediately upon selecting that menu, but also have a rocker switch located in right rear of cargo area, above the power outlet, and mounted in the same removable panel the power outlet is in. Another easy way to verify is simply to look in the wheel wells. If you see coil springs surrounding a strut/shock unit, then you don't have air suspension.

If you do have it, you can select trailer mode in your car menus; what it does is lock the air suspension into one ride height, so that it's not automatically raising / lowering the car like it does normally, depending on how fast you are driving, etc., and this keeps your trailer level/tongue weight stable.