Need help fix Audi V8

[Seiji Yokoi <yokoi@ja2.so-net.or.jp>]

I own an Audi Quattro V8 4.2-litter (left hand drive), which is 4 years old but 
runs only (20,000 Km)and suffering following problems, and I need a help to fix 
these problems.

1.  When driving on a little bumpy road, I can hear a rattling noise around left 
rear around wheel housing.  I have checked exhaust muffler, and left rear 
suspension, however noting seems to be loosen, or fix improperly fix.


2.  While normal acceleration, perhaps 1/5 acceleration pedal down, sometime I can 
hear whistling nose from around right read door.


Please gime me any suggestion to fix it.


yokoi@ja2.so-net.or.jp

Seiji Yokoi