Over the past couple weeks, I had been driving a good amount moving from one apartment to another. I hooked up a trailer and immediately got a service 4wd system message. This has successfully been fixed. A couple days later, I got a message saying immediate air suspension service/repair required. The front of the car didnt have any air in it at all. I took it to a dealer and they replaced a relay and the control module, and then told me there was a leak and it was going to be over $700 to replace the air lines. I picked the car up this morning and what they had said just didnt seem right to me. It will level out in the park position, after about 5 minutes. It will not raise the front one bit, but I can not hear any kind of leaking. It really just acts like it doesnt want to do anything. Im really concerned that it isnt the air lines leaking and dont understand why it wouldnt raise up at all, unless there is a massive leak in the system.