[Prancer]

My car is not charging properly and the mileage has to be incorrect I hope.. Why does it sat it's 97% charged and only has 37 miles ? At 100% it's only going to be 40 miles at most.

And no it's not on and the heat isn't on and it was showing an incorrect ratio of battery to mileage for yesterday and the day before too. Honestly I feel like it's been charging to a lower and lower number but I've only had it for 2 months and it started out charging to 63+ miles. Please if you know anything please share.

The car has 17k miles on it and its a 2019 EQ. I cant imaging the battery running down that fast when it only had 1 previous owner who only drove 13k miles. And Ac/Heater are off.

 

[smark]

Take it to a smart/MB dealership. Have them pull some codes, if there are some.

Batteries lose their efficiency, after a while of use. How many miles are on the car? How old is the 12 volt battery.

 

[DudeInTheSmart]

Confirm no heat or AC turned on. That would halve the range.

 

[jwight]

Moved to electric drive forum.

 

[Prancer]

Take it to a smart/MB dealership. Have them pull some codes, if there are some.

Batteries lose their efficiency, after a while of use. How many miles are on the car? How old is the 12 volt battery.

I dont know how old the battery is. I got it used. But losing 20 miles in 2 months is unbelievable.

 

[Jo e Lefors]

I see in the your first post you state that the car only has around 17,000 miles on it.
That amount of battery degradation does not seem right.
How close is the nearest smart authorized Mercedes Benz service department?

I dont know how old the battery is. I got it used. But losing 20 miles in 2 months is unbelievable.

Especially when you only have
around 60 miles on a full charge to play with.

 

[SMARTKAR]

See what happens at 100% charge

 

[hallcp]

I imagine the displayed range is a guess based on past driving experience. I wonder if you could have a stuck front brake caliper or dragging handbrake? Does the car seem to drive OK?

 

[Prancer]

I imagine the displayed range is a guess based on past driving experience. I wonder if you could have a stuck front brake caliper or dragging handbrake? Does the car seem to drive OK?

Whoa this right here might be the problem. I started using the hand brake and sometimes forget to take it off completely a few miles at a time. It doesnt really set well and sometimes I get confused about it being all the way off or not. But when I tried to diagnose the problem I tried to make sure it was off. I'm charging again and this time Im gonna make sure again it's completely off.

 

[Prancer]

See what happens at 100% charge

It stopped at 38 miles at 100%

 

[Prancer]

I see in the your first post you state that the car only has around 17,000 miles on it.
That amount of battery degradation does not seem right.
How close is the nearest smart authorized Mercedes Benz service department?

Especially when you only have
around 60 miles on a full charge to play with.

It's nearby but im in a tight spot right now and they charge an arm and a leg and a kidney before they'll do anything

 

[SMARTKAR]

You should drive around 30 miles (but not far from home) then see what percentage you have left

 

[Jo e Lefors]

It's nearby but im in a tight spot right now and they charge an arm and a leg and a kidney before they'll do anything

Sadly I feel it is going to have to go to MB
Or have everyone else guess at the problem.

 

[DealMeIn]

The most important question here is where do you live? If it's a cold weather state or it's gotten cold where you are, that's your most likely answer.

When it gets cold you have the double whammy of the car will not charge the battery as high (and won't let it get as low) and the battery is not as efficient so you get less miles/KWh

For instance I live in the Chicago area and charged my car up last night with temps below freezing. It would only take 11.7 KWh of electricity to go from 22% SOC, 39.6% actual to 100% SOC, but only 88.6% of actual charge.

In the warmer months it will both get closer to 100% and down closer to 10% actual charge plus I get 6+ mi/KWh vs 4+ in the winter when it's below freezing.

 

[Yinzer]

The range indication when you start with a full battery is only a very imperfect estimate based on past consumption patterns and the temperature. It is NOT an indicaiton of the actual battery pack capacity, and it does NOT mean you will only get 37 miles from the charge, unless it is a very cold day (0F or so).

On the earlier Smart ED, you can reset the range indication by resetting the data since last reset (average speed, mi per kwh using the odometer reset button. I assume you can do this on the EQ too. Read the manual.

Also note that heat usage is only part of the reason for reduced range in cold weather; at least 50 percent of the reason is that the available energy you can get from a lithium (or most other type) battery pack before hitting the minimum allowable pack voltage goes way down in cold weather.

Stop worrying and drive the car. You will find that the range indication adjust itself as you drive it. Note that a better range indication can be had by watching the trip odometer and the SOC gauge, for example if you go 15 miles from 100 percent SOC to 80 percent SOC, you know the range will be 75 miles if driving conditions remain constant.

 

[MB DNA]

Welcome to SCoA. Lot’s of questions but let’s begin with - why are you driving with the handbrake? That will likely give you reduced range if you fail to take it off while destroying your SOC (guess-o-meter) range?

Where do you live, winter weather and cold temperature can be of impact on your range. The heater/defroster will kill your range, heated seats can be your friend. Are you charging in the garage or outdoor in the cold?

Is your EQ still under warranty?

 

[Prancer]

The most important question here is where do you live? If it's a cold weather state or it's gotten cold where you are, that's your most likely answer.

When it gets cold you have the double whammy of the car will not charge the battery as high (and won't let it get as low) and the battery is not as efficient so you get less miles/KWh

For instance I live in the Chicago area and charged my car up last night with temps below freezing. It would only take 11.7 KWh of electricity to go from 22% SOC, 39.6% actual to 100% SOC, but only 88.6% of actual charge.

In the warmer months it will both get closer to 100% and down closer to 10% actual charge plus I get 6+ mi/KWh vs 4+ in the winter when it's below freezing.

I dont know what fixed it but it's slowly recovering. I pumped the hand brake and the brake pedal a few times and charged it twice after it went down and each time I charged it the range grew. Now it's sitting at 53 miles at 100%. Also that previous picture was when that terrible cild storm hit. I don't know how but I'm just glad it's on the mend. The cold was probably 60% if the culprit tho.

 

[Prancer]

Welcome to SCoA. Lot’s of questions but let’s begin with - why are you driving with the handbrake? That will likely give you reduced range if you fail to take it off while destroying your SOC (guess-o-meter) range?

Where do you live, winter weather and cold temperature can be of impact on your range. The heater/defroster will kill your range, heated seats can be your friend. Are you charging in the garage or outdoor in the cold?

Is your EQ still under warranty?

The EQ is probably not out of warranty, I'm driving in Florida and the heater will only lower your range when it's on. The heater can't run when it's charging or at least the hot air doesn't come on. So when I took the picture the heater was off. It's been fixed by the way. Ir at least it's getting better somehow. This is my third charge since the post and it's at 53 miles at 100%. It's slowly getting back up to 60 somehow.

 

[Prancer]

The range indication when you start with a full battery is only a very imperfect estimate based on past consumption patterns and the temperature. It is NOT an indicaiton of the actual battery pack capacity, and it does NOT mean you will only get 37 miles from the charge, unless it is a very cold day (0F or so).

On the earlier Smart ED, you can reset the range indication by resetting the data since last reset (average speed, mi per kwh using the odometer reset button. I assume you can do this on the EQ too. Read the manual.

Also note that heat usage is only part of the reason for reduced range in cold weather; at least 50 percent of the reason is that the available energy you can get from a lithium (or most other type) battery pack before hitting the minimum allowable pack voltage goes way down in cold weather.

Stop worrying and drive the car. You will find that the range indication adjust itself as you drive it. Note that a better range indication can be had by watching the trip odometer and the SOC gauge, for example if you go 15 miles from 100 percent SOC to 80 percent SOC, you know the range will be 75 miles if driving conditions remain constant.

Thank you so much. I just reset the miles. I fiddled with the hand brake and the cold storm passed. This is my third charge since the post and I'm at 53 miles at 100%. Hopefully it will continue to grow from here.

 

[MB DNA]

I pumped the hand brake and the brake pedal a few times and charged it twice after it went down and each time I charged it the range grew.

Pumping the handbrake/brake pedal won’t improve the range?

Using THE HANDBRAKE to slow or stop also won’t give you any regen???

Do your brakes not work thus the use of the handbrake?

Note, might want to know what warranty if any remains as most M-B dealers have essentially put up a “smarts (ICE/ED) NOT WELCOME” sign…