Does anyone know what the cause of the steering knock in an S3 is? It's something that my motors had from new, I just thought it was to do with the speed dependant steering. It's become more frequent recently and at my last service a couple of weeks ago, they recommended I have it looked at. Cars booked in for next week, so should be sorted under the warranty. Just interested to know if anyone knows what the root cause is, or could direct me to a thread where this has been covered before.