Hello! I got a ctek msx 5.0 and would like to refresh my batteries with the reconditioning program / desulphation again and keep them in fire by regular use. In the operating instructions for the SL, of course, in order to suffocate any claims from possible damage already in the bud that the batteries are to be removed during charging. I would like to do without the removal of the batteries, as this would always be associated with effort (expansion of the battery) and learning ECUs) and because it has been reported several times that after disconnecting and again clamping the batteries various error messages have occurred, which have made a visit to a service station, sometimes even with repair effort, necessary. After the reconditioning program / desulphation passes the pulsating voltage through the ctek up to 15,8V, I have the fear that control units might be offended. Unfortunately, I did not find any clear statement about the reconditioning program for connected batteries in the R230. Therefore, my specific question here: Did any of you R230 owners regularly use the ctek in the reconditioning program / desulphation for batteries connected to the on-board network and can give warning, or just report on negative effects? Was the ctek directly connected to the battery poles, both the starter battery and the consumer battery, Lossen? My vehicle is an R230, SL350 from 2003. Thank you for the answers! MfG pial345