DRC Knocking - how to explain it to Audi

[RSphwoarrr]

Going to Audi West London in a few days to get it checked. Given the subtlety of the knocking I'm already picturing the potentially disappointing outcome - "we couldnt hear anything" "sounds normal" "my manager has an RS which does the same" etc... etc...

Before i go, can anyone advise how to best describe and explain the issue to them? Goal is to reduce their ability to say they cant find anything by being as specific as possible + making suggestions on what they should check.

The knocking is subtle like a rattling CD, comes from the rear passenger side boot area, and gets easily drowned out by other noises.

Would love to hear from anyone who's had experience dealing with Audi on the issue of DRC knocking.

[Markp]

1. Remove cargo area floor to make it easier to hear. 2. Put car in Comfort and take tech out and drive over rough surfaces at 5-30mph.

If they don’t get it, insist they check the pressure in the DRC - and offer to pay for it if normal. If pressure is low you have your problem. Bingo.

Just don’t be brushed off with top up. They need to find leak and replace accumulators (in most cases).

[captain haza]

I have the same problem. I have had my rs6 a month and trying to figure out all the problems and niggles before returning it to the dealer.

I have read loads of posts and so far , possible things to check are

drc pressures need checking I believe they should be 13 bar
the noise can be transferred to the central valves. One guy changed the valves and it solved his knocking problem
cj joints, bottom ties and bushes can be worn

if I get mine fixed ill drop another post

good luck

[Markp]

I should add that I ended up having 6 new control valves in 40k miles. And my C7 had 4 and a complete set of new dampers due to persistent knocking over 35k miles.
And no, I don't weigh 40 stone, or drive on particularly crap roads
All covered under new car warranty, dealer (Tetbury) was great and every fix worked for about 10k miles. Perhaps unlucky, but I would NEVER choose DRC again.