Warning!
- Battery acid is highly caustic.
- Protect your eyes, face, hands, clothing and the paintwork.
Remove left, right and centre covers. See Group 46.
Caution! Disconnect the battery only with the ignition switched off. Disconnect the negative battery terminal first, then the positive one.
Disconnect the earth lead (3) from the battery and insulate it.
Remove positive lead (1) from battery.
Disengage rubber strap (2) holding the battery.
Remove battery drain tube (4).
Remove the battery.
Grease the battery posts with acid-proof battery terminal grease.
Acid-proof battery terminal grease: e.g. Bosch Ft 40 V1.
Note:
- Disconnecting the battery clears all entries (such as errors, adaptations) from the BMS control unit memory.
- The loss of the adaptations may sometimes lead to engine performance being temporarily impaired when the engine is restarted.
- The BMS restores the lost adaptations itself over the following operating hours.
Switch on the ignition.
Open the throttle once or twice fully with the engine off. Motronic registers the throttle valve position.
Installation is the reverse of the removal procedure: pay particular attention to the following.
Cauton! Connect the positive battery terminal first, then the negative terminal.
Route the positive lead vertically (arrow) to the battery post. Make sure that all battery cells are visible through the inspection port in the cover.