I also see the same kind of regen that you do which is excellent. The figures you're seeing for the mpg seem odd though. What mine "seems" to do is base the mpg off how much fuel is used overall, including electric miles which then gives you a much higher figure.Hi,
I have had my a250e for just a few weeks. I came across this discussion when trying to work out how Mercedes Me calculates MPG and MpkWh. Yesterday my journey was 177 miles, mostly on motorway. I started with a full battery and at outset it said I had a range of 32 miles on battery - I understand this will be a guesstimate based on previous usage but also environmental conditions such as temperature. I thought I would try the 'route based operating mode strategy' and set the sat nav for a return journey (as I could not recharge en route) and selected eco mode. So I thought the system would look at the whole return route and work out when to use full electric (up to 32 miles) and petrol to get the most economical journey overall. Having arrived home and looked at the Mercedes Me trip details it tells me I have travelled 177 miles, 68 in electric only, MPG is 67, mpkWh is 18.8. I am assuming MPG is calculated on the whole journey with electric and petrol combined so pro rata this works out at 41 mpg while just on petrol. 41 mpg seems low as I was cruising on the motorway most of the journey so I was wondering if part of the petrol consumption was taken up by recharging the battery which achieved 68 miles fully electric out of 177 - when it projected I would get just 32 miles fully electric before I set off (and the maximum stated by Mercedes is 44 miles). I concluded that the battery must have recharged to an extent over the journey. Obviously this would cost in terms of petrol usage to recharge (and explain the very average 41mpg on petrol only) but I presume that the Mercedes analytics system works out that the electric generated will be more beneficial in the whole journey than the cost of the petrol consumed to recharge.
I have read here that there is little recharging of the battery during the journey but my experience yesterday doesn't seem to be consistent with this. I have not found anything on the Mercedes website to explain how the figures in the Mercedes Me trip data are calculated. Have I misunderstood something here? 🤔
Thanks. Yes, 256 mpg is a nice 'headline' for promotion 😏 and I understand it is an overall figure for a range of typical usage in petrol and electric combined. However, I cannot understand the 68 miles on full electric unless there is significant regen during the journey (albeit at the cost of more petrol). Or is it really possible to get 68 miles full electric on a single charge if the conditions are right? If it was the latter, I would have expected the electric range figure to change in the display during the journey. During yesterday's journey the range started at 32 and gradually reduced (I only once noticed it increase, by 1 mile, before reducing again), at the end of my journey it showed a range of 1 mile remaining. I may be misunderstanding the Mercedes Me app figures but it ought to be easy to interpret for the general user and also to have some clear explanation in the Mercedes literature unless the intention is to make it deliberately opaque 🤔The figures it gives are simply the amount of fuel/electricity used over the entire distance regardless of what has actually driven the car. Thats why MPG is quoted as 256
Thanks. Yes, you're right. I am also expecting the estimated electric range to increase over time as the car 'learns' that it can get more than 32 miles on electric (it will probably also increase the estimated range as the weather warms up). As I expressed in an earlier response to this, it would be nice to have a lay person explanation of how it all works in the Mercedes literature but I haven't found it yet! 😊I also see the same kind of regen that you do which is excellent. The figures you're seeing for the mpg seem odd though. What mine "seems" to do is base the mpg off how much fuel is used overall, including electric miles which then gives you a much higher figure.
I have seen the app take a while to update the figures completely though. Try force closing the app and reopening.
The estimated electric range is electric only and assumes that you won't use the ICE at all. Therefore if you run it purely on EL mode that is what you will get (roughly). I find my electric range estimate to be pretty accurate. It usually gives me a figure of 35-40 miles which I regularly achieve.Thanks. Yes, you're right. I am also expecting the estimated electric range to increase over time as the car 'learns' that it can get more than 32 miles on electric (it will probably also increase the estimated range as the weather warms up). As I expressed in an earlier response to this, it would be nice to have a lay person explanation of how it all works in the Mercedes literature but I haven't found it yet! 😊
The flashing triangle means you are too close to the car infront, so it will apply max regen braking if you come off the throttle to increase the gap to the car in front.Hi
As previous post, have had new A250e for 5 days, AMG Line Executive. My previous car was a Prius Hybrid.
I think I am going to enjoy the car a lot, but the AI does some very strange things that make me feel that I am not in control.
When driving in comfort mode, the car will randomly apply the brake to regenerate the battery, Is there an understandable pattern to it?
Sometimes the car in front warning triangle flashes, and it brakes. sometimes it just brakes for no apparent reason.
I guess this is linked to the recuperative braking but its really confusing in its behaviour. Coming up to a roundabout, it will brake quite firmly when you would have coasted, then stops braking when you need to stop. This really messes with your head, as it is not predictable - oddly in electric mode it does not happen and feels normal.
Sometimes it brakes because it decides that it should prior to a junction/roundabout. Sometimes it just brakes when you lift off. Sometimes it behaves like a normal car. I find the experience unnerving - I am the driver, not the computer that doesn't have the ability to anticipate what is happening with the cars in front.
Is the cruise control adaptive? I have used it twice, and concluded that it works in the opposite manner to the recuperative braking function - pretty much launching you into the car ahead - again this is the opposite of the Prius, where you could select adaptive or standard cruise control.
I have learned to switch off the lane departure detection after it nearly swerved me into a cyclist - ridiculous that you have to do this every journey, On the prius you could switch this function off permanently (and I did). Is there any way to switch this unwanted AI interference off?
Any tips from happy drivers would be appreciated,