Standby Mode Function




Looks as if putting the e450 into Standby Mode turns off a lot of the monitoring electronics; not to worry since I park the car in a locked garage at home. So is there any downside to putting the car into Standby Mode?




Looks as if putting the e450 into Standby Mode turns off a lot of the monitoring electronics; not to worry since I park the car in a locked garage at home. So is there any downside to putting the car into Standby Mode?




Couple weeks ago I got CTEK 5.0 Trickle Charger based on all the reviews and discussions here that it is the best and it worked great since after charging the battery under AGM, Recondition Mode charging it for couple days; it got fully charged and was able to place my 2018 W213 in standby Mode and I got the famous display message estimating the duration the car can stay parked for 28 weeks !!.
So I drove the car earlier this week; and tried to place it back to Standby Mode; but now it is greyed out and the check box can't be select, while a message says "System Inoperative" Any idea what "system inoperative" means for Standby Mode? Why last week it was working right after it was charged and now it is "inoperative" whatever that mean. Is there a fuse that blew, or a reset needed somewhere? Nothing about "Standby Mode System Inoperative" exists in the Manual or online.
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