I'd go back to them and quote the Fixed Price Service costs for each service - which for the 4 year plan comes to £826 excluding brake fluid changes for the two Intermediate, one Full+ and one Full services. If they come down in price (which my dealer did), you could include the two brake fluid changes for around £904. Whatever 'extras' you get included (brake fluid change, air con service, MOT's or whatever), get these written into the service plan - that way each party knows for certain what is included and what isn't. Also query whether there are any additional benefits - for example my current plan provides 10% off accessories, parts and labour for other items I buy or work I have done outside of the service plan.