the bad weather may be a clue to your problem,I am not sure on Renaults but on some models they have a very stiff c.v boot and have seen the small clip on the driveshaft work loose allowing water and dirt to enter the joint and wearing out joints rapidly,and some so bad causing a very bad vibration.I would have a look at your c.v boots and see if there is any excess play,also try driving with veh on full lock and listen for knocking from either side.It sounds as if you have had your suspension/steering/wheels/tyres checked out so it may be worth a look,good luck.
cdc
February 2013
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