This is where i saw it but im still not sure what you have to do
From 172cup.co.uk
Knocking noise when turning / on full lock Problem: Many Cup owners report a loud creaking/knocking noise when on full lock, particularly at low speeds when turning onto a driveway for example.
Cure: Quote "Technical Bulletin (TI) 1505" to your local Renault Dealership, they can then look this up and it will explain the work they need to carry out. The name of the problem is ""Knocking Noise From Front When Turning". Essentially they modify the shape of the strut top into an egg shape to stock the knocking. Its important that they then rust-proof as bare metal will be exposed. Sadly many Cup owners have reported that the work done has not cured the problem but if you are fortunate it should give you the required results.
Cost: Under warranty this is free as its a known problem that was never cured by Renault at production stage. Once the warranty has run out some people have been quoted nearly £300 for the work. However as its a known and common fault with the vehicle you may be able to negotiate with your dealer.