Removal and installation the battery (BMW 5 Series E39)

The battery is located in the luggage compartment behind the right side trim.

Caution: If the battery is disconnected, the contents of the fault code memory devices may be erased.

The contents of the fault code memory devices of some electronic control units may be erased.

The code of a radio with anti-theft coding is erased. Such radios can be identified by the message "CDDE" which appears on the display for a couple of seconds immediately after the radio is switched on. If the code is unknown, then further operation of the radio becomes impossible. The correct code is on the card supplied with the radio; if it is missing, the radio code must be requested from its manufacturer.

The radio settings for transmitting radio stations are erased, as well as the clock settings and on-board computer data.

After connecting the battery, the sliding roof panel drive must be reinstalled.

The contents of the engine control unit fault code memory are erased.

Removal

Turn off the ignition.

Open the luggage compartment and fold down the right side trim.

Remove the plastic insert from the lid.



Disconnect the battery wires, first disconnect the ground wire (-) "1", and then the positive pole wire (+) "2". The positive wire connector is covered with a cover, it should be removed.



Remove the hexagon head bolt "3" and unscrew the nut "4".

Remove the retaining clip "5" and cover "6" of the battery.

Remove the plastic spacer holder "arrow".

Move the battery slightly backwards in relation to the car and release it from the holder at the front.

Disconnect the ventilation hose at the front upper edge of the battery.

Fold up the carrying handle and remove the battery.

Warning: The battery contains toxic substances that should not be disposed of as household waste. Old batteries should be taken to special collection points. District and city administrations should provide information on where such points are located.

Note: When purchasing a new battery, you must return the old one to the seller, otherwise you will have to pay a deposit for the new battery.

Installation

Before installation, clean the battery terminals until they shine with a suitable brass wire brush.

Insert the battery so that its poles face the wing.

Connect the ventilation hose to the front upper edge of the battery.

Push the battery forward until it stops. The base of the battery should fit into the holder.

Insert the remote holder.

Install the battery cover and retaining clip.

Screw on the retaining bracket.

Connect the positive wire to the positive pole (+), then the ground wire to the negative pole.

To prevent corrosion, lubricate both poles with an acid-resistant protective grease, such as BOSCH pole grease.

Caution: Do not apply grease between the poles and terminals. Otherwise, especially when starting the engine, high contact resistances will occur, leading to overload or failure of the electronic control units.

Cover the positive pole with a cover.

Insert the plastic insert into the side cover and put the side trim back in place.

Set the time on the clock. Tune the radio to the transmitting radio stations.

Installing a sliding roof panel drive.

If required, enter the anti-theft code into the radio.