I think these service/maintenance contracts are a bit of con.
Firstly, you don't get a choice of tyre make, and secondly, if you are on the T&D servicing, you can't then ask them to use the LongLife oil.
Not stictly true with the oil. Dealer agreed to use the long life oil as long as I specified it each time and agreed to pay the difference.
I'd insist on getting that in writing! And I'd also check carefully the invoice at servicing time.
My agreement was for all servicing maintenance and tyres at 10k/year and costs under £26/month. Over three years this costs £925.
Based on costs at my dealers:-
3 services = £465
Air con service =£80
WTF - Air con is not routine maintenance. On all of my previous cars with air con, they have NEVER needed a service, and they included by 4 year old S4, and a 7 year old Astra. Pure rip off.
Brake fluid service =£80
Another rip-off. VW can normally be haggled down to £40 for the BFC.
First MOT =£45
Total for just servicing is £670, so even if you drive like a granny you will need 2 new front tyres at around £240 total and so this comes to £910. Even basing the outlay on these minimum requirements you are already balancing your outgoings and that is at current pricings. 
Like I said, you'll not get a choice of tyres, so if you have Dunlop or Bridgestones, then you are stuck with them.