Kessy Unit/CCM Damage Unregistring Key

[AdrianVD]

Hi Guys,

Iv'e purchased myself a crashed damaged a6 avant, the damage is to the rear driver side quater. The key does't unlock the car and i have replaced the battery, power cut off fuse and tried holding the key to the syncronising area to no avail.
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I've been told this has caused damage to the vehicles kessy unit however i cant find anywhere online that says anything about a kessy unit however apparently the CCM is located around the area that is damaged - above the fuse box, however looking at photos of a CCM it doesn't look like anything that is shown.

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My questions are:

Does anyone know if it's the CCM or Kessy Unit?

Where Is this Located?

How do i replace one of these if it's broken?

Will the new CCM/Kessy unit need coding in?

[DPN]

This may help https://audi.7zap.com/en/rdw/audi+a6+avant/a6/2016-798/9/909-909000/#11 (http://www.vwaudiforum.co.uk/forum/usertag.php?do=list&action=hash&hash=11) one of the Kessy antenna #11 (http://www.vwaudiforum.co.uk/forum/usertag.php?do=list&action=hash&hash=11) is in that area

[morski]

Its the BCM which is mounted behind the right quarter panel trim. A bit further up from the pic you took. If its damaged it will need a new one matched to the vin of the car and coded online with ODIS for it to work and your keys too. If its intact ie opened and inspected for a broken circuit board etc then check your wiring for damage and shorts before replacing it. A damaged antenna will not cause issues