I have a Citroen Xsara Picasso (diesel) with 91,000 miles on the clock. A squealing noise, sounding like a slack alternator drive belt, developed when accelerating. The car was booked into the nearest Citroen main dealer to investigate. The diagnosis was a worn clutch release bearing. The quote to replace the clutch was just over £1000. I took the car for a second opinion (and quote) to another Citroen main dealer. The diagnosis was a loose hose on the turbo, fixed free of charge. Could you advise which main dealer I should use in future?