I was just looking at last year's service sheet to see when the next one was due and noticed that the dealer recommended a brake fluid change at the next (this years) service. This will be the cars second service and it has done around 8000 miles. They are obviously trying it on aren't they?

Brake fluid needs changing on a time basis, not mileage - my VW needs it changing every 2 years although the first change isn't needed until 3 years old

On a car within warranty I'd stick to the recommendations to keep the warranty intact and a brake fluid change is usually pretty cheap.

Whether it needs to be two years thereafter in reality is debatable.

However in the past I've witnessed braking systems that clearly hadn't had a fluid change in some time, usually as I'm removing components ready for a car restoration/repair but I've seen some horrors that made you wonder how the braking systems had been working at all previously. One terrible example was actually my late Dad's Volvo 740, I did a brake fluid change as part of a bigger job and the mastercylinder reservoir substantially changed colour and what came out was dark and cloudy. I ended up having to strip the system down though as it threw up a dual circuit fault light - basically there was a sensor between the hydraulic circuits that had rusted up internally. At least on the Volvo it had a robust braking setup with two separate circuits/pistons/bleed nipples on each front caliper and they all undid without protest - unlike some of the ones on VAG cars!

Out of warranty probably two years is overkill but myself after what I've seen I usually stick to that schedule.