Check that it is de-energized on the jump-start connection point using the multimeter:
WARNING: This page is about a different variant/trim than selected.
 Courtesy of AUDI OF AMERICA, LLC
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-- Open the cover -1- by releasing the catch.
-- Measure using the :VAG 1526E
between the positive terminal -2- and the negative terminal -3-.
- Display on multimeter = 0 Volt.