'98 A6 questions

[Valerie Delane <valerie@savina.com>]

Hello all,

Since the last time I wrote this list asking about the factory financing 
plan, I procured a fully loaded '98 A6Q, black, which I am exceedingly 
pleased with.  I have a few nagging questions the dealer cannot answer, 
however.  Perhaps someone here knows: 

1 What is the exact model number of Motorola hands-free voice-recognition 
cell phone that is supposed to plug into the factory prewired jack?  The 
Neither the local Audi dealer, random cellular dealers, nor Motorola can 
tell me; Motorola did offered a central Audi USA phone number 
(313.340.5481) which, for 3 days, a bell recording reports as out of 
service because "the line is being checked".  The only clue the local Audi 
dealer supplied is they "think it might be different than for the '97." 
Yes, I actually need this--the car with double-paned glass (part of the 
warm weather package) shields at least some radio waves: my hand-held cell 
phone, radio modem, and garage door opener barely work, if at all, unless 
windows are rolled down!  

2 Wierd noise #1: When I first start the car, especially cold, a loud 
whining buzz issues from the undercarriage somewhere around the driver 
side rear, then stops, as if something is self-adjusting.  It used to go 
as long as 20 seconds--now it is down to 1-3 seconds.  ??  

3 Wierd noise #2: I back the car into the garage (as much to easily admire 
the front view as for a quick getaway).  When I first start the car, put 
the transmission in drive, then roll down the driveway with my foot 
lightly on the brake, there is a single crunchy scrape I can feel through 
my braking foot, as if a chunk of something is being scraped off the disc. 
But it only happens on the first wheel revolution after brake application
begins, and I never hear or feel a hint of it again until the next morning
when I take the car out of the garage again. Another self-adjusting 
feature?

Thanks in advance for any clues, and best regards,
--V 
valerie@savina.com