After removal/installation of the on-board electrical system battery (G1) basic programming (normalization) of the vehicle is required. Remove on-board electrical system battery (G1).Disconnect positive line of on-board electrical system battery (G1). ![]() Disconnect ground line of on-board electrical system battery (G1) and protect it against unintentional contact.Remove transmitter key (A8/1) from EIS control unit (N73).Switch off ignition and switch off all electrical consumers.On-board electrical system battery (G1) Procedure for removing the on-board electrical system battery (G1): Remove the transmitter key (A8/1) from the vehicle and keep it outside the range of the transmitter (at least 2 m). In vehicles with Keyless Go (code 889), press the Keyless Go start/stop button (S2/3) repeatedly until the ignition is switched off.In vehicles with TELE AID (code 855), set the TELE AID to Service mode. ![]() The charging time depends on the battery temperature (calculated from outside temperature and engine temperature) and lies in the range of 12.180 min. Voltage of on-board electrical system battery (G1) > 11 V Recharging occurs with current and voltage regulation (U = 13.5.16.6 V).G1/4 Starter battery Starter battery (G1/4) (internal charging) The starter battery (G1/4) is charged by the vehicle power supply control unit (N82/1) under the following conditions:.Connect negative clip (2) of charger to negative terminal of starter battery (G1/4).Connect positive clip (1) of charger to positive terminal of starter battery (G1/4).Check condition of starter battery (G1/4).G1 On-board electrical system battery Starter battery (G1/4) (external charging).Charge on-board electrical system battery (G1). ![]()
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