Not sure you can cancel after 18 months Sue. I think you sign up for the full term!! You aren't saving much anyway. We paid £410 for 4 tyres recently and reckon you could talk the dealer into a cheaper service too (£199!)
We've been running newish Audis/VW's for years the A/S3 tends to do around 10K miles a year and we sell after 3 years circa 26-36k miles. We've never had to pay for any routine maintenance at all apart from tyres and maybe a wiper blade or two.
Ok thanks!
You can cancel anytime you like according to my dealer. But perhaps the best option is to just buy the £399 - 3-year service package. Then pay for tyres as I need them. Cheers! X