I have replaced the compressor today with an AMK from Arnott, when doing the work I noticed that I had an air leak on the black pipe that comes out of the valve block that runs to the front of the car.

My question is does any know where this black pipe goes to or have a schematic of the pipework. I have repaired the leak as it was just due to someone fitting the pipe back into the valve block poorly in the past.

It runs to the valve block connected to / above the reservoir under the drivers seat (RHD) in the channel under the car.

You can find pipe runs in RAVE or the later manual, both in the wiki .
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Joe thanks, I forgot I had already downloaded the 2007 workshop manual when I posted this thread.

Having dug through the manual, the black pipe does indeed appear to be the feed to the air tank, which if it was leaking makes sense as to how the suspension behaved before in that if the car had been standing it would take an age to rise between heights but if it was at the end of a journey it would be fine.