[FDR]

I would slightly disagree with Parkwood, as in the case of my EQA and probably the EQB, it’s easily possible to get the max range figure without having to use eco mode or to drive in an excessively slow manner, I generally get max range or within a few miles of it, just by driving smoothly and anticipating the road in front. I use D- regen and comfort mode and unless I’m in a hurry on a motorway I keep to 60 to 70mph maximum.
I am a bit surprised to see your range figures differing by so much as I don’t think mine have been more than about twelve to fifteen miles apart. Maybe your last trip was a short one or a faster one in comparison to your average.

 

[FDR]

If you have to rely on one it would be the lowest range figure, I personally use the battery percentage figure and the readout of miles per kWh display, while it does need some mental arithmetic those figures tell you what you are doing at present rather than being based on what you have done up to now.

 

[FDR]

Mercedes puts their ideas on best practices for battery life in the Eco coach app, It may not be available in all countries but it says there’s no harm in charging to 100% but the car should not be parked for more than about 10 minutes in this state, so if you need a full charge for your journey it would be best to charge just before leaving.
If the car is to be parked for more than a day or so the battery is best about half charge but more than 10%