If the pump is disabled, automatic and comfort will stay illuminated if already selected because it requires no change in ride height. Seen it before too.

The fuse you speak of.is it located near the module under the steering wheel dash panel ?

Just above Relay #373 (Assuming an OEM relay is installed for the compressor) behind the dash panel (that has a knee airbag) next to he steering column.

kool..ty..i have a compressor that I just installed from a donor car so didnt know the life of it. but there was a lot of water in it whenever we installed it .
.it pump the car up and I believe it's just stuck so I believe obviously I don't have a leak but it's not functioning at all just stuck up..(better than slammed) . the "lift"in the "dynamic" is grayed out on my MMI screen so I believe it's telling the system its at full height..so im lead to believe either a relay or fuse or just the compressor !
now if I had a compressor that timed out due to overheating(my original compressor that i still have) or this one that may have got wet, is it possible to rebuild whatever part inside that has to do with or is it toast?I know you could rebuild them but I know that's for seals for leaks

HI guys,

Sorry to do the zombie-thread thing but I just had the same issue on my car, although the circumstances are a little suspicious. My car has been parked all summer, while, among other unrelated things, I changed the piston ring in the air suspension compressor and the air suspension fuse and relay. There was nothing wrong, I just thought I'd do some preventative maintenance.

On it's first day out, after 65 miles of behaving perfectly, I stopped at a garage to have my AC regassed and, when I got the car back, a few seconds later, the air suspension light came on. Lift mode is greyed out and the compressor is not turning on. The car was level and at the right height, so I drove home and scanned with VCDS, to find the 00668 code - terminal 30 open or short to ground:
I'm going to investigate the fuse and relay, seeing as they're likely culprits. I bought both from Audi. Is there a chance I got a dud relay or fuse? Could the AC regas process cause this? I know that sounds nuts but I'm wondering if the electrics are linked, or maybe if the long time spent with the car running sitting idle may have done it. I can't imagine the garage jacked up the car for an AC regas but I didn't see them do it, so I can't say for sure.

Also, could anyone that had this issue and resolved it please say what the fix was?

OK, so I refitted the old fuse and relay today. Cleared the fault code and the light went away. The car levelled itself fine but I think it was using the residual pressure in the tank in the back. As soon as the compressor was asked to come on (by me selecting lift mode), the fuse went pop and the amber light came back on. Reading through this thread, I saw this comment:

Mister Bally, is that repairable, or is a new compressor required?

Not worth the repair given how cheap compressors can be had. I've personally installed two of these and instructed many members to do likewise. Just grab this unit and be worry free for years to come.

Why do People keep replacing pumps blindly? The pump only dies if over heating due to the relay stuck close, either being faulty or monkeyed with the suspension using VCDS. My car's pump survived 2 airbags leaks incidents and still working perfectly. Yes, I was ignorant to buy the rebuild kit and it's still in the garage, a waste of money.

Thanks guys, I've found a compressor at a slightly-less eye-watering price than Audi charges but I'll wait to diagnose it as faulty before I fire the parts canon. On the S8, it's such a pain to remove and refit! Wish me luck...

One more question: are there any common areas that cause the compressor to overload when activated? I'll try and connect it to a separate battery out of the car, to isolate the compressor from the wiring but is there anything that jumps out as a common failure point or telltale?