s 350 suspension gone down no pump noise

Look for a blown fuse or tripped suspension switch. Read thru your owners manual about ride control as well.

Right rear corner of engine compartment fuse box, one of the maxi-fuses is for the air-matic compressor. If its blown, your compressor is probably junk. If the fuse is good, try disconnecting/re-connecting the main battery in the trunk. Start the engine and try the switch again.

Does anyone know if there is a fuse in the truck for the airmatic on a 2008 s550 4 matic I scanned the car and it is telling me that it is in safe mode the compressor is locked how do you unlock it