good idea cleaning lens covers. i didnt even think about doing that. hope it works out for you. and as far as the removing the bumper cover, i have an 02 745i, and you can possibly get to the driver side, but as far as the passenger side, there is a big metal braket in your way, so the headlight has to be loosened and brought forward to get them out. good luck. you shouldnt have any problems. just take your time.. show pics when youre all done.