thanks for all the great feedback , ok don't kick me for trying what I have tried but i took to the scratches with t-cut and cotton cloth and alot of elbow grease....couldn't really tell it helped as the scratches are only visible when the sun is at a certain angle.....so will report back later....comfort glass? you mean the one with so called sun protection? already got that installed......again thanks to all who replied

__________________
E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N