Caution! On vehicles with the Telematic system, before disconnecting the battery, activate the service mode of the Telematic control unit - Radio, telephone, navigation.
Switch off the ignition and remove the ignition key. Where necessary, remove the floor from the trunk. Fold the trunk floor mat forward. Loosen the nut a few turns and disconnect the Pfeil ground wire pole tip from the battery pole terminal.
Connection
When connecting manually, place the ground wire terminal on the (-) battery terminal and tighten the nut. If the wires are reconnected to the battery terminals, the following must be done: activate the vehicle equipment elements (radio/radio navigation system, clock, electric windows) in accordance with the operating manual; deactivate the operating mode of the Telematics control unit. Radio, telephone, navigation, self-diagnosis. Check the operation of the radio remote control, if necessary, synchronise the radio code. Inform the customer that the second and additional codes must also be synchronised to ensure remote radio communication. Query the fault memory of all control units and, if necessary, delete the fault message "Unteispannung/Low voltage".
Instructions: After reconnecting the power supply, the A8S/ESP indicator lamp goes out only after several meters of movement.
Tightening torque: Battery terminal to terminal post: 6 Nm.