You pay for the service as there is only likely to be one over the 2yr period. There are contracts available with maintenance inc but I found that these are not really worthwhile.
but when you do the maths you know the exact amount the car will cost you over the 2 yrs + service cost + maybe 2 new front tyres. No worries about anything else as it all falls under the warranty period. After the 2 yrs you just give it back.. (not to mention the fact that you can hammer it

)
Sometimes they even offer to sell you the car at rock bottom trade price! They did this with a megane I had a few years back. I bought it and put it in the trader. Sold it on the thursday morning for £800 more than what i paid for it. That car cost me hardly anything for 2 yrs motoring

(shame it was a bag of sh!teee)