Even if the shop installs correctly, the system has shown to be undependable. I have recently gone through three complete DRC repairs (shocks and both valves) over a several month period. I've now had it back for about 3,000 miles and I know I'm already living on borrowed time. :0

It is the most frustrating issue of this car. However; it is a blast to drive when operating.

Put away a few hundred dollars every month into the "repair" kitty for the normal maintenance and repairs. It is the cost of owning the RS6.