muddflapp

2005 A8L W12. Does anyone have a picture or diagram of where the wabco pump is located? This is not it. 03_AR_CO says it's an SAI/smog pump. MP4.2+6.0 says the pump is higher up. My encrypted licensed bentley for xp documentation shows a tiny picture of where it is located on a 4.2 A8(L) but does not show where it is on a W12 A8L. The pump slowly pumps, but turns itself off because of temperature. I can reset it with my laptop and it pumps up more until it shuts off again. system leaks somewher

muddflapp

I have already replaced the right side front air strut with a new one from Suncore.
I attempted to replace the drivers side when I broke the head off the frozen pinch bolt.
When all is working, I can stop the car, get out, stand next to it and feel it going up and down (automatic mode)
I feel if there is not a leak, the computer control is wearing out my air pump.
The valve block does not appear to leak. The right front goes down fastest and and the left front deflates to meet it. Now the pump quits trying.
I don't really have a good test for the green (right front) air line.

MP4.2+6.0

Yes, it should be higher up than those smog pumps. There are two of those pumps close together BTW. Compressor is in the next vertical level above those on my W12. Pretty hard to get at from most any angle. From above even with the air box on that side out, the power steering pump + reservoir also sort of block seeing or getting at it.

Right side dropping first suggests that strut is/remains the issue. Reference to "new one from Suncore" doesn't really make objective sense to me--in that the OE supplier is not Suncore. Sounds like a rebuilder maybe? ... which I haven't heard of. Fail rates on rebuilts are high. Easily double digits, and perhaps 30% or more. Some right out of box, some in months, some after a year or so. Have you done a soap leak test on replaced strut, including right at the air fitting? For both of my leaky ones over the years, soap test did not show anything, so not definitive. But it could still be at or near connection which should show. Also possible it is the air block--not a leak but rather a solenoid not closing fully and then air leaking back out though the system and the venting. No practical experience on mine seeing that, but just trying to work thru failure scenarios that would logically fit yours.