We bought a new Nissan X-trail in January 2008. We have fitted a Britax (known as Romer in Continental Europe) baby seat (group 0+, backward facing, isofix, baby safe plus). We are pretty sure it is correctly fitted, but with the tilt of the back seats, the baby seat is so upright that my 5-month old daughters head always rests on her chest when she falls asleep. We are soon to embark on a 7 hour drive across Europe and I am worried about her being in that position for so long, even with a few stops. However, I don't want to remedy the seat position by using seat-belt fastening instead of isofix as I've read that this is not very safe. Has anyone else had a similar problem, and how did you remedy it?