ffej2016 Posted September 4, 2022 Posted September 4, 2022 This problem has cropped up again after not doing it for a couple of years. Typically, it happens when I disconnect the level 2 charge cable after charging. This time I had charged it from 30% to 80%. As soon as I disconnect and turn the key on to leave it gives me the "Drive Sys. Engine Off" on the display and it won't start. It has also did this after a half hour drive after shutting in off and going into a store for 15 min in the evening. I waited 45 min for it to start and it didn't so I had to leave it and walk home; i live close. It started the next morning. I brought it to Mercedes a couple of years ago for this exact problem and they had no idea! It was out of warranty at that time. When it was doing this a couple of years ago I found out it would usually be ok it I turned on the key before unplugging. It was also doing it with my 110 volt cable. Quote
MineCooky Posted September 4, 2022 Posted September 4, 2022 smart EV from 2017 or newer? I'd replace the 12 V battery. Quote
ffej2016 Posted September 4, 2022 Author Posted September 4, 2022 I have had that problem before and it shows a different warning and I had this problem before with a brand new 12v battery replaced by MB. I will check my 12v soon Quote
jwight Posted September 4, 2022 Posted September 4, 2022 Not sure if this applies, but it's interesting reading: https://www.smartcarofamerica.com/threads/drive-sys-off-ev-workshop-12v-battery.157861/ Quote
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