jeffkruse

did not totally fill up. Never had problem before usually in the garage but had to park outside last night. Anything I can do to prevent from happening again if I have to park outside. It is a 20045 Audi A8 4.2L

Shark_V8

How do you mean? The system should be air-tight (no air loss). Now there will be a contraction due to air temp but that will be easily restored on start-up.

If you have a leak, then it stresses the little/old compressor.

Going into jack mode will conserve air pressure. Putting it on jack stands might gain some

jeffkruse

started the car, let it warm up a bit and came back and air suspension was back to normal. Also drove home from work and no problems, but it sounds like from previous comment I might have a leak somewhere. I forgot to mention earlier that the yellow and green lights(car) came on as I was driving. Sorry, actually it was just front passenger that was low to ground

MP4.2+6.0

When you have it back at home, put it in jack mode and see if it drops overnight (or longer). Jack mode keeps compressor from trying to level it even when off.

jeffkruse

but it did not drop overnight. And I have not had an issue since them -9 degree weather over night. Once it warmed up(20 degrees), it come back fine. Also just front passenger side as well, all other shocks were fine and like I said once it warmed up that day it came back

jlbell

Some suspension drop is normal when there is a significant decrease in temperature, as the airbag and surrounding area heat up to probably around 70 degrees F during normal operation, then cool to around (in your case) -9 degrees F. Audi even mentions this in one of their SSPs.

carl viking

same as above. Esp when car has been driven from garage and then parked outside for a while, and THEN temp drops. Car checks height after 1,3, 5 and 10 (? or similar) number of hours. if decently warm outside, the reservoir does not loose much pressure during those hours. If temp then drops from say 40s to 0 or below, the car will sink. At that point reservoir is cold and has less pressure.
Good news - lock and unlock car, car tries to use reservoir pressure to raise car. if not enough. it won't. Start car, compressor starts and all is well. BTDT

jeffkruse

that the little car warning lights came on(red,yellow) then the yellow one started flashing because my right front passenger side fender was almost touching the tire. Luckily I was just pulling into my parking lot when it started flashing

Trond B

Has anyone tried to change the PTC on the compressor? For my compressor did burn out without displaying any codes.
has anyone put a additional relay in serial with 40A fuse to switch of the compressor from the inside.

Mister Bally

What do you mean by PTC?