Thanks to all the various posts on stuck roof mechanicals which led me to this link below showing that the likely fix was the resetting of the cam in the rear cover release mechanism. My good lady partner was in a right tiz when it stopped working with Renault dealer £ signs flashing up in her mind! Took 30 mins and I was in her good books all weekend! http://www.mendmy.com/answers.php?id=38257
On the subject of Renault dealers diagnostic skills - a few weeks ago the good lady phoned me to say that her engine was running rough and she was worried about it breaking down. She took it to the local Renault dealer who without testing the car tells her that at that mileage (63K) it would need a head off and decoke at £1000. I then test drove it to find it flies (2.0
- not bad for a Frenchie) but had a vibration through the seat. Rear wheels balanced and it now runs fine! Is there no government department to shop these thieving dealers to?