Scirocco Central

Having finished a three year service plan last year (that I took out when buying my scirocco in sept 2010), I now have my fourth service coming up at end of August. MOT as well.

I believe it is an interval service required plus air con, is this right?
Having searched the forum a bit I have read a few posts that say year four is a major service?

I do really low milage - 22k total over the life of the car so far.

I plan to ring a few local vw dealers to play them off against each other price wise, but just want to get clear on what service work I actually need
Also, I was originally planning to use a local independant garage, but getting the sense a vw dealer may be the better option for this fourth year service and mot?

Any help apprecited
Thanks

Are there no VW specialists near you? They tend to be better and cheaper than a stealer