water ingress repair rear bumper removal

A while ago i had water coming in in the recess bit on the left hand side of the boot.and now believe it maybe coming from one of the(what i call)an air vent.and in order to seal around both vents i removed the rear bumper.there are youtube videos for doing this i just tapped in audi a4 b8 rear bumper removal.i found it quite easy to do.i removed the rear left and right covers in the boot then removed x2 10mm nuts from behind the rear light area(pic 1) then removed both plastic screw in holders(pic 2) that hold the rear lights on,by loosening the holder by inserting a philips in th whole turning it anti clockwise.but while doing so held onto each light as i then removed the connector(pic 3) from each light by pressing on the connector with my thumb and at the same time pulling on the connecter(a bit tight).....then removed x3 t20 torx screws from both rear wheel arches(pic 4)and then removing the other x3 t20 torx screws from underneath the bumper(no pic)......then removed the x2 plastic pins by lifting them up with a flat bladed screwdriver(pic 5)....carefully prize apart both left and right sides of the bumper(pic 6)and carefully remove the whole bumper....then just do the same in reverse order to put the bumper back on.....tips....be careful not to drop the 10mm nuts in the recess(i dropped one but have a magnet rope.(pic 7)....when re-alining the bumper up use the 2 long screws as a guide and while pushing the bumper in check that 2 plastic holders in the middle of the bumper on the inside slot in place....very important too that you have to open like a plastic door(pic8)on either side of the bumper to insert a bit of the plastic bumper and then you close the plastic door in order to be able to slot the long plastic holders in place.....be also carefull that the edges on either side of the bumper for the wheel arches dont scratch your paintwork and be carefull when slotting them in place when putting the rear lights back in i would suggest inserting the plastic screw in first(pic 9) so its protuding and then push the light in while still holding the plastic holder and light, and start !Removed! it into the light....(pic 10)showing where water was getting in.(pic 11) bumper.(pic 12-13) order numbers only 1 number difference between left and right light..sorry for been so long winded hope you get the drift of how to😀