I booked mine in for the rattling doors and speedo and when I took it in they'd got the recall details on the job card all ready. They sorted it but one still remains on the rear door so it's going back in for that in a couple of weeks.
I've had cars in the past that have had hard to find rattles and had them with the dealer only to be told on pick up "we couldn't find anything". Persistence definately pays off as eventually they'll hear it and fix it.
Thankfully with the door rattles there is a known SEAT bulletin for it so they acknowledge it's an issue which is a big start. Take it in and let them have a look, they'll put some foam packing in or something but it definately helps. If it's not right when they've looked at just take it back until it is, as it's still related to the original issue they should sort it until you're satisfied.
I agree with cptSparko, my dealers been spot on so i'm hoping the next visit will be as succesful.