Hi all,<br />Tried to research this over the last few weeks, my father's 2014 C220 has this message. Was in red, then in white. Then the message disappeared for a few days and now it is back.<br /><br />His previous W211 E class had a similar fault and it did have an aux battery that we changed and problem solved. This one doesn't sound so straight forward!<br /><br />We can't find an auxiliary battery and a post online referes to a capacitor for the stop/ start function. His logbook says "type =204", am I correct to assume this is a W204? Or could it be a W205? What's the best way to tell? It's logbook date is sept 2014 and seems be on an overlap between the 2 models.<br /><br />The capacitor/ voltage convertor has part number 2059053414. Does anyone have any information about this part? Mainly interested in if it is a plug in unit or needs soldering and if we can cause any other issues when we change it.<br /><br />Hopefully I'm not barking up the wrong tree thinking it's the capacitor, all help appreciated<br /><br />Many thanks<br />RobK