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You ARE working with a belief without your own measurement. You believe that whatever the factory publishes for the battery capacity is correct. Spec sheets are notoriously inaccurate. And, there is always some variation between design and production. The SparkEV spec sheet doesn't even know how...

Your condescending attitude does nothing to further your credibility. And your inflexibility to criticism is holding you back from improvement. At least you did finally relent the last time we got into a debate about battery charge/ discharge depth versus life cycle. People are not stupid and no...

It's great that you are trying to do some independent range testing but you have obviously made some mistakes in trying to report energy consumption. it's too bad that you seem to have an inflexible and belligerent attitude toward criticism because this will only serve to hold you back. Your...

Yes dude. Apparently. You are not even measuring consumption in any way. Your just going off of the spec sheet for battery capacity. The Spark is not 20% more efficient than the Leaf. 5.0mpkWh for your stated spec for the Spark would be 170MPGe. Not happening.

So apparently the EPA doesn't do any of the certification testing for ev's right now. Instead they leave it up to each manufacturer. . http://avt.inel.gov/pdf/uev/eva/etautp3r0.pdf . "While EPA strives to periodically update the regulatory test procedures such that all technologies are...

I have read that they are quoting battery to wheels, not wall to wheels, which means they are using the onboard readout unless they have a logging amp clamp/ slash volt meter.

Does anyone here know offhand how the EPA determines the energy efficiency numbers for EV's. Is it an extrapolation based soely on the capacity spec that the Manufacturer states? Or do they actually charge the car to ful, drive the test loop, and measure the power as they charge to full again? ...

EPA shows a difference of 8% highway. Not 20%.

The test methodology needs to improve if real energy efficiency is to be determined. It's one thing to show the range. Which I will admit is the main concern among prospective buyers. But to extrapolate energy efficiency just from dividing the miles covered into the spec sheet value for the...

Run flat tires ride harsh and are expensive. This is a very bad trend in marketing for MB.

Have you personally observed someone getting 200Whr/ mile in a SparkEV? That seems unrealistically high. Where does that number come from?

These cars are piling up at the dealers. I would hold out for Tax, Tags, first month down and $299/ month.

That is a difference of more than twice as much. Very big difference. . I drive 120km per day. It adds up.

I think that much of the difference in efficiency comes from the fact that Mercedes decided to design the in dash read out to reflect all of the power that is used from the wall to the wheels whereas some other manufactures are stating an optimistic value of only the portion of energy that...

I would rather wire a standard electric 240v plug than to have your charge station hard wired so you can take it with you if you want. The electrician will charge you a lot less if you just tell him you want an outlet for a welder. Then you can just buy an electric range cord for the charge station.

The front sensor looks out through the star. The rear sensors look out through the sides of the rear bumper. You can get that message if slush or mud starts to build up.

The rear seat headrests seem to be a major flaw. They don't go down all the way and they don't come out. Which means that you can't fold the seats down with the front seats in any kind of normal position.

Why spend $1,000 for a set of wheels for a lease car? Just change over the tires each season. it is a good idea to rotate and balance tires twice a year any way.

It seems more like an issue with that particular charge station.

Feel good battery talk.