W220 Airmatic

[BENZDRIVER14]

I have an 02 s430 and it has the airmatic warning light on, but when you turn the car on it goes up no problem and when you press the button for the car to rise it gives no problem and goes right up and stays. (tested to see if weight on the hood would bring it down and nothing it stayed strong, brought it to a specialist and he test the seals by spraying water to see if the front was leaking but nothing, he qouted $200 for something that needed to be done. wondering after reading these forums its the relay also any ideas?
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02 S430 67k all lights upgraded to 03 plus thanks to ebay all OEM new, 20% tint all around