Watch out for those dodgy dealers. I was in the stealers before Xmas and I overheard the service manager convincing a customer to have a cambelt change despite it not required by the service manual and openly admitting this! He said 'we' recommend one anyway...
I tried to warn the customer when the manager left to get some paperwork, but he'd convinced him anyway. They are the 'experts' after all.
An the other hand I had a hell of a job convincing the Seat dealership with my last car the brake fluid change was due every two years... he had to go look it up.