Good day to the group. I hope someone has a good idea. My SL now has two batteries that are managed via a relay as well as a control unit (R 230 drivers know this yes). Both batteries are NEW ! With running engine and all consumers I measure between 14.2 and 14.4 volts charging current on the batteries ! I have charged both batteries with a CTEK charger to the green point ! After approx. 60 KM drive both batteries have only half power and the starter turn t like with an almost empty battery, although I have measured the charging current. How does that work ? Does someone have a solution or idea It’s about a SL 55 AMG Thank you in advance and soon nice open weather. Lg.