Typical issues, check the level sensors as seen here https://www.carmanualsonline.info/audi-a6-allroad-1999-c5-2-g-pneumatic-suspension-system/6
If they are ok, see other components from the manual and try to look for the faulty one
Cheers
Greetings, has anyone retrofitted an auto bootlid function, since it seems pretty convenient from the technical perspective Audi D2 boot manual page 10
But regarding coding and other electrical components, would it need some special adjustments?
Yep, you should buy them separately, see the diagrams starting from page 2 https://www.carmanualsonline.info/audi-a4-1997-b5-1-g-rear-brake-service-workshop-manual