I have a 2008 E280 sport saloon, only two weeks old. Used the heated rear screen for the first time and the top 5 rows don't demist . Everything below the top 5 has vertical lines 1/4 way in from each side and they all work well. Looking at the screen there are gaps everywhere in the top 5 rows, convinced screen was faulty I went to the dealers and they say the top 5 rows are the radio antenna and NOT part of the heated rear window.......is that right? I compared it to another E Class in the showroom and the gaps are the same , just confused.........I accept that the screen may be the radio antenna but surely it should be a HRW as well? Does everyone elses screen do the same as my car? Roger.