My dealer offered a free 90 day check up which I took as they're only 2 miles away. All they did was check the oil, coolant etc and gave the brakes and tires a quick look. It only took an hour but I saw no harm in them taking a look just in case there was an issue but it turned out a bit of a waste of time really. I didn't even get a free coffee while I was waiting though, very obvious difference between a prospective customer and someone they're doing free 'work' for!