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306 Service, maintenance Battery The battery is maintenance-free. Fitting of electrical or electronic accessories at a later date can discharge or add extra load to the battery. Take advice on the technical possibilities, e.g. use of a more powerful battery. Parking the vehicle for more than 4 weeks can lead to battery discharging. This may reduce the service life of the battery. Disconnect battery from on-board power supply by disconnecting the negative terminal. deactivated as follows: switch the ignition on then off, disconnect the vehicle’s battery within 15 seconds. connecting battery. Then perform the following actions: display, see pages 124, 127, 132. z If necessary activate the window and sunroof electronics 3, see pages 51, 54. In order to prevent the battery from discharging, some consumers such as the courtesy light automatically switch off after approx. 20 minutes. from/to the electrical system Before charging, isolate the battery from the on-board network. First remove the negative and then the positive terminal. i.e. the terminals for the positive and negative leads. When connecting, start with the positive lead and then connect the negative lead. Protecting electronic components In order to prevent faults in electronic components in the electrical system, never connect or disconnect battery with engine running or ignition switched on. Never start engine with battery disconnected, e.g. when starting using jump leads. make any modifications to the electrical system, e.g. connecting additional consumers or tampering with electronic control units (chip tuning). 9 Warning Have the battery change performed by a workshop. Please comply with the legal, environmental and health regulations as regards the disposal of old batteries. 9 Warning Electronic ignition systems generate very high voltages. Do not touch the ignition system; high voltage can be fatal. |