If you find the relay, there should be a part number on it. There are 2 black relays behind the battery (behind the black plastic panel). One will say "Klima" on it, that's the one. The other one is the fuel pump relay.
I'm sure Phil at partsShop will know what you mean if you mention the Klima (klee-ma) relay, i guess it would otherwise be called the climate control relay or compressor relay, but is pretty much universally called the klima relay. I'm sure they carry it.
ps unsure why this came up before your last post, been acting wierd lately