2002 Audi allroad for awhile now when I go out to my car in the morning the rear of the car is down I soap checked all of the air bags the air lines and the pump "no leaks" now when I get in my car the green lights on my suspension height adjustment might or might not be on and the air pump will not come on .then maybe after driving it awhile and shutting the car off then restarting it might come back on, who knows it weird today the green light will not come on at all and the dash warning light is on I check the fuses they are fine .could it be the air pump? the block valve ? or a relay can anyone help with this ??? thanks