Was your car an import and not covered by the 3 year warranty, as the window repairs should have being covered ?
I have just had my 05 Scenic in for the 2nd window to go. Wish I'd read this before I went in as I have just forked out another £300.
I need to ring them tomorrow to see what is happening with the instrument panel display that has mysteriously stopped working while in the garage, so I shall mention this also.
Do a Forums search under Scenic dash display, could be a sore one if the dash has gone down as in most instances it needs a complete replacement £450 + From Renault.
There are companys that can fix them at considerable savings.
Get onto RCS and ask for their input, Email them via their web site and follow it up in the morn with a phone call.