Hi
You might get them to check the torque rating on the wheel nuts; have a look at the bearings; em...check out the transmission mounts (apparently the rear one I think can move around a bit) and also, depending on the year, have a look at the seal around the rear diff where the driveshaft enters - I think it can crack/move around/do something that it is not supposed to do.
Oh, and see if they can lubricate the sunroof mechanism too!