Audi A3 1.9 TDI

[ILoveCorners]

Having a few problems and thought you guys might be able to help. Firstly the cars passenger side wont open even when the button on the fob is pressed a few times. All doors open apart from that one. The under tray is falling off and scraping against bumps, driveway and rocks. The car making a knocking sound when you do go over bumps and pot holes, it is the back left side that makes this sound. Also today i`ve noticed that when you change gear and let it go it makes a blow sound, same thing occurs when you rev hard and let go, it makes a blow off sound which is weird. Its not too loud but loud enough for a picky person like me to hear. The main thing that is really bugging me is the under tray as I have to drive less than 10mph over bumps while biting my tongue.

For ref. it is a 2007 audi a3 1.9 tdi

Ta