Hello Talker, I need your help !! I have a G 400 CDI and 3 months ago after washing (high-pressure spotlight) flashed in the display battery / generator defective and shortly afterwards undervoltage. I drove to my dealer. He told me that the alternator was defective. It was checked additionally still at MB = alternator defective. Well can happen is stupid because very expensive. I had the damage repaired for a lot of money and everything was wonderful again. Last Friday was i ch again when washing (high-pressure spotlight) and now the shock in the display of the beautiful note battery / generator and shortly afterwards undervoltage. It probably cannot be that already Lima is in the ass again. The installed was an overhauled alternator. Who knows about this problem with the G or the 400. I would be happy about your help. After washing also the Automati light did not go on. This can now be done again and I have about 11.0 volts voltage in the extended display. I am happy about hints. Greetings Tomi