Join Date: Aug 2005
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It won't get any better - eventually it will fail completely.
Exactly the same symptoms I had with a Laguna. It requires a replacement reservoir. (Comes as a sealed unit with pipes) Mine was done under warranty but I believe it is fairly straight forward and is situated under the dash panel and above the steering column.
Currently in Mickdoc's garage:
2006 Renault Scenic 1.5dCi privilege