A6 Wingmirror and rear heated window

[cobes]

HI Ive got an A6 1.9 TDI 2004 and some little scally has kicked the wingmirror off. Had a look on ebay and there is one for 1998 -2001 model although my car looks the same. Do you know if it will fit ?

Also whenever I put hte heated rear window on the radio has massive intereferance. I presume a bad earth, anyone have any ideas ?

THanks for your help
cobes