Ferrari dealer service departments are at their best when servicing newer models, like less than 10 years old. Anything older than that, dealer expertise and factory support drops off precipitously. In that case, you are much better off going to a reputable independent Ferrari specialist. Many of these shops will be staffed by ex-dealer employees. It's still important to go to a Ferrari specialist, as a general purpose indy mechanic will probably cause issues or do things in an inefficient way.