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what the heck is this?

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Old 05-04-2001, 06:49 PM
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Default what the heck is this?

there is a small grill on the drivers side b pillar in the middle of the pillar. Closer to the trunk release. I can't seem to figure out what this thing does.

Any Ideas?
Old 05-04-2001, 07:57 PM
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I beleive it's the opening for the internal motion sensor for the alarm system...
Old 05-04-2001, 07:59 PM
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Default It looks like a speaker of some sort, perhaps for the hands free phone feature or

back-up beeping sound. I have wondered about this thing also, in fact have lost much sleep. I thought I figured it out once, but I forgot. Or as ZCD says.
Old 05-04-2001, 07:59 PM
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Default i dont think it is, they are at the top of the b pillar...

this one is in the middle facing the drivers seat
Old 05-04-2001, 08:54 PM
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Default Re: what the heck is this?

The speaker for the Nav and phone.
Old 05-05-2001, 04:28 AM
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Default We have a winner! (Actually two it appears.)

Both Brian Lay and Finman are right: it's the small speaker used in Bose cars to output the "external" audio from handsfree phone, nav, etc...

The Symphony head unit routes speaker-level output (from external sources like Phone and Nav) to one of the front speakers (IIRC, programmable from the same menu structure as SVC level).

HOWEVER, the Bose system has active speakers, so you get an itsy speaker in the B pillar, connected to one of the speaker-level outs on the Symphony head unit. (Left here in the USA.)

Anyone with an Audi phone (or "properly" wired aftermarket) and Bose can confirm that this little speaker is used by the phone.
Old 05-05-2001, 06:56 AM
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Default I thought that was the cell microphone.

Doesn't the phone speaker use the left rear Bose speaker?
Old 05-05-2001, 08:31 AM
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The driver side A Pillar has the microphone.
Old 05-05-2001, 08:44 AM
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Nope, A6 microphone is in dome light assembly. ('00 Bose at least)
Old 05-05-2001, 12:45 PM
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I agree. The cm square grill is definitely the motion sensor.


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