I recently bought a three year old C3 Cachet for my wife. Generally we are very pleased with the car, but yesterday we noticed that the door seal on the driver's door had a three inch split, which appears to be due to the rubber perishing. Are door seal failures a known feature of C3 cars? And secondly, is a replacement seal a 'dockyard 'job, and expensive, or is there a repair scheme available? I know it's mainly a cosmetic problem, but the door seal looks pretty unsightly now. tristar