Battery -A-, DISCONNECTING AND CONNECTING, 0K4 AND VH0: 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.
-- Lift the luggage compartment floor cover.
-- If equipped, remove the spare tire.
-- Avant: if installed, remove the subwoofer. Refer to COMPONENT LOCATION OVERVIEW - SOUND SYSTEM / SUBWOOFER -R211-, REMOVING AND INSTALLING .
-- Disconnect the connector -3- on the Auxiliary Battery -A1- by opening the contacts in the Auxiliary Battery -A1- and it will not have power.
-- Remove the nut -1- and free up the ground cable -4- for the Battery -A- on the threaded pin.
CAUTION:
Risk of short circuit due to the ground wire.
- Insulate the ground wire
-- Immediately wrap the ground wire with insulating tape -2- and set it aside.