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Home >> BMW >> 2011 >> 335i 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (General Electrical System - Repair - E90) >> Safety And General Information >> 61 00... Battery >> Battery care and maintenance

Battery care and maintenance

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In low-maintenance batteries, check the electrolyte level at least once a year. If necessary, top up with distilled water up to the top marking.

The increasing number of electronic control units in the vehicle reduces the self-discharging time of the battery (even in standby mode). To maintain the battery service life and to avoid exhaustive discharging, recharge laid-up vehicles every 6 weeks at the latest. The time for self-discharging depends on vehicle type and equipment specification.