hi man! sorry for late answer, i never use this forum

i dont know so much about audis but the work i have done on my car i did myself. not hard work but u see some minor things u can do to make the car look cool. and not too expensive things i have used.
about the front bumper , there is almost no audi a6 front bumper i like so i had to do it myself. its original. the thing i have done is that u put a Black Matt foil on it. its almost like a sticker but hold much much longer and looks much better. its the type of thing they use on commercial company cars. i took it on every silver frame in the upper grill lower grill and between so it will look like one big a5 grill. also the same deal for the breaklights back. i bhought a silver foil same colour as the car and put it on the top so u only can see a minor white stripe when i reverse my car ( yes i have changed the orange light with white light bulp looks much better) the foil is high quality and u can get it done where people give their company cars to write something on them. and when u sell ur car u can take the foil off.
back window bulps i have no idea. have never taken my hand there yet.