As ever I return here for some impartial guidance, as opposed to the confusion that reigns and the far from impartial garages who seem to want my money! My CL600 is showing "Service B" required in 500 miles. I've called Mercedes, who tell me the service will be £408, and I've also called an independent Mercedes garage, who will charge £270. However, when I spoke to Mercedes, and quoted the current mileage (70k), it was suggested to me that at 60,000 miles the car would require new plugs (of which I believe there's 24 of them). At this mileage I was also told that the car would require new combination filters and brake fluid change. Of course with the car being finely tuned and wanting to maintain performance then I'll do whatever is required for the car. However the service charge for the above is now quoted at £1,200. I've done some reading around, and indeed seen that the car is supposed to have the plugs replaced at 60,000, however I have been into the Service Booklet, checked it with the stamped Garage, and confirm that all 24 plugs were replaced at 31,000 miles (December 2010). Combination filter was also replaced, and likewise brake fluid, within that service and more latterly at 53,000 miles (November 2013). My question therefore, given new plugs all round at 30,000 miles does the car need replacement at 60,000 miles too? And likewise the combination filter and brake fluid, given both changed less than 2 years ago at 53,000 miles, are they required again some 17,000 miles later? Surely the car computer would tell me so, but it isn't. As ever your assistance would be appreciated. This could be the difference between a £270 service and a £1,200 service!