Hi lets face it the dealerships have been having peoples pants down for years, they prey on the customers trust and lack of ability to check what has and has not been done, I can cite a fair few personal experiences with Ford and Vauxhall and if you trawl the net for any franchised dealers they all have pretty horrific records which is why I whole heartedly agree with Wazza, you are much better off with a little independent garage if you can't do it yourself.
You shouldn't have to ask a main dealer to change fluids etc at the appropriate milage they should be TELLING YOU it needs changing but from their perspective its better not to as they make fortunes when a major component fails, when I bought my car it according to Manchester Audi had been given a full whistles and bells service at 36k I bought it with 40k on the clock so when I got it home a week later I ripped it apart and replaced everything and sure enough the air filter could only be described as round and black the fuel filter was original from the date painted on it May 16 2016 the car when I bought it was just over three years old, the only thing they had changed was the engine oil but regardless of that I changed the whole lot including the gearbox oil and brake fluid at least I was starting from square one, you can tell when a dealership service manager is lying his lips move.
Steve.