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Message: <blockquote data-quote="oligokoko" data-source="post: 378288" data-attributes="member: 14920">using improper type of battery will make a high battery discharge. to b safe, since u still have warranty with d grey importers, ask them to replace it with an original BMW battery. what t2ribena say is also correct. u must also ask them to register the battery to let d car know on what current and cold starting ability of current battery r using now. what joshua say is also correct. e60 usually have this problem. tcu/ulf control unit kong, which will result in idrive n radio intermittent failure. just 2 b sure, when d idrive is ok, try n pair your hp with ur car. if it fails, then there is ur culprit.happy troubleshooting !</blockquote>