Numptie of the highest order
Re: Creaking from n/s rear
same problem more than likely the ARBs, mine has now been fixed twice in the last year, first time the guys at Audi Plymouth identified it as being just the joing creaking, and stripped / cleaned everything and it was ok for about 10,000 ish motorway miles. then Audi, then AmD said it would be the ARB and bushes, so when I had everything else done had those replaced, the creaking has got a lot quieter but it's still there over uneven roads, so I've been told by AmD it's the rose joints that are still creaking.
Will be getting a second opinion this week hopefully as I want to see under the car with the mechanic, and didn't have time at AmD to sort that out.
hope you get it sorted!