Just had the same happen on a 55 reg grand scenic. Flickered and reset for a week before finally packing right up. Everything else worked apart from the remote radio controls.
Rang Renault head office direct who asked me to take to the local Renault dealer to diagnose before committing on contributing. I had bought the car privately 6 weeks ago and it has no warranty with 42k on the clock, when I last saw it!
Dealer tried to take £100 after the inspection which I refused to pay. Renault said that they would not cover any of the £500 odd quid to replace the dash.
After asking to speak to the customer service reps manager at Renault head office (nicely, don't lose it!!) she offered to pay first 50% (thanks but no thanks) and then 70% of all costs...net result £153 to get a new one fitted within 48 hours.
Not ideal, this part should never fail, especially on a three year old car but better than I was looking at yesterday.
Thanks to all for posting info on this topic but it is worth talking to Renault direct from this personal experience. Most dealers will try and rip you off.
Cobbler
November 2008