1. Include systems of an emergency call in the service mode:

· Include ignition.
· Turn on phone.
· Gather on the receiver *#4610#. Confirm with the help "OK" the appeared message of "Kein Telematikdienst" ("the Teleinformation service is absent").
· Switch off ignition.
· Switch off phone.
2. Remove the lower trunk lid.
3. Turn out bolts of fastening of an eye over a back suspension bracket and uncover the control unit.
4. Unscrew 2 screws of fastening and uncover for TELEAID control units.
5. Disunite the socket of the battery and take out the battery.

1. Insert the new battery. Carefully join and fix the socket.
2. Put into place a cover of control units and fix it by screws.
3. Switch off the service mode:

· Include ignition.
· Confirm with the help "OK" the message of "Service-Mode verlassen" ("To leave the service mode").
· Confirm with the help "OK" the appeared message of "Kein Telematikdienst" ("the Teleinformation service is absent").
· Switch off ignition.
4. Fix a cover of control units.
5. Establish the lower trunk lid.