A6 AM Radio Reception Improvement

[Michael Callaghan <Michael.Callaghan@digital.com>]

The last discussion on AM reception turned into a list of words spelled
like voila, so I'm going to try to resurrect the original subject.

Basically, I just traded (up?) from a 1990 200Q to a 1996 A6Q. Both cars
had the Bose system. My A6 has an Audi Delta head unit. 

The 200 got wonderful AM (and FM) reception. I could get Boston AM
stations in Manchester, NH, and vice versa. My A6, by comparison, can
barely receive Boston stations just outside of Boston! In fact, radio
reception in general is horrible. 

I've noticed that there is no obvious antenna on the A6. I've been told
it's in the rear window.

What can I do (other than replace the head unit) to improve reception?
TIA!

Michael Callaghan
Brookline, New Hampshire
1996 Audi A6 Quattro
1998 Ford Expedition