Battery -A-, DISCONNECTING AND CONNECTING, 0K2: Disconnecting
WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
-- Switch off the ignition.
-- Remove the bolts -arrows-.
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-- Remove the cover -1- to the side.
-- Loosen the nut -1- several turns and remove the battery ground cable clamp -2- from the battery terminal.
 Courtesy of AUDI OF AMERICA, LLC
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-- Cover the negative terminal.