Interested to hear if problems with the rear springs on Q7's are common? I have a 2016 3ltr S Line with a FF retractable towbar & have been doing regular monthly 6hr journeys towing one horse with the horse standing in the offside section of the box. Last week I took the car for an oil change & was shocked to be told that the offside rear coil spring had snapped. I asked to keep the spring. There is no rust evident but the cup looks extremely worn / damaged. Is this a common occurrence when towing & should the suspension have been upgraded when the towbar was fitted during the build?