Battery -A-, DISCONNECTING AND CONNECTING: Notes

• For subsequent work on the SCR system, wait until all of the reducing agent has returned after switching off the ignition.

Disconnecting

Vehicles with 48V System (PR Number VH2/VH3)

The 12 V system is supported by the 48 V system via the Voltage Converter, 48 V/12 V -A7-. So the only way for the 12V vehicle electrical system to be de-energized is to de-energize the 48V system beforehand.

-- On vehicles with 48 Volt system, de-energize the 48 Volt system. Refer to 48V SYSTEM, DE-ENERGIZING .

Continuation for vehicles

-- Switch off the ignition.

-- Adjust the right front seat as far to the rear as possible. Use the entire adjustment range of the seat adjustment for this.

-- Remove the floor mat from the footwell.

-- Release the cover -1- upward -arrow A- and remove toward the center of the vehicle -arrow B-.

Courtesy of AUDI

-- Open the cover -3- over the battery negative terminal.

Fig 1: Disconnecting Battery

Courtesy of AUDI

-- Loosen the nut -1- several turns and remove the battery ground cable clamp -2- from the battery terminal.

-- Use insulating tape to prevent the battery negative terminal from accidentally contacting the battery terminal clamp.