My front right is going down when parked >8 hours.
The rear left goes high.
When I start the car, it rises back and the green light comes on to say the car is lowering! I think this is because the rear is lowering.
I never get a yellow light, also never hear the compressor at all in 9 years of ownership. I have no idea when it is on or off, is that because it's a diesel?
I was thinking of getting this valve where you connect it to the strut instead of the pipe and blow it up like a tyre, and then can see if the strut is leaking by leaving it overnight and see if it sinks.
https://www.ebay.co.uk/itm/Schrader-...r/192687349732
trouble is, not sure exactly what is required for the A8 D3, the seller has other similar items.
Also, two front struts can be quite cheap now - £450 a pair delivered...
https://www.aliexpress.com/item/2pc-...33a619cdRhJLVv