w220 airmatic problem

[nebbie]

I am having problems with my airmatic pump, for some reason there is no power being sent to it. I checked the majority of the fuses under both fuse boxes but found no blown fuses. Does anybody know which fuse the airmatic fuse is? If I send power to the pump directly from the battery or test light, then the pump will turn on and raise the car up. Could it be a relay, if so which one? These airmatic problems have been driving me crazy. Thank you ahead of time.