Join Date: Mar 2015
Location: Pittsburgh, USA
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I notice from the display (they only put the "snowflake" freezing temperature warning on Canadian cars for some reason) that you live in Canada. I hope you say "Toronto, Halifax, Vancouver or other relatively balmy place and not, say, Saskatoon (especially this winter). Because if you Smart was left parked all winter in the latter region, It does not look good at all (the prognosis is not so good if you are in the warmer parts too)
You must keep the Smart car plugged in for charging at all times when the temperature is below -20C (and preferably warmer) Seven days or more left unplugged at -25C or colder can ruin the lithium cells in the HV battery pack. But, by removing the 12V battery, you disabled all the car's systems required to turn on the HV battery pack heater and the battery heater itself (it runs off the 12V syatem) even if you had plugged it in. Yes, I know, in very cold climates, people sometimes bring their car batteries indoors in winter (although a fully charged Pb-acid battery won't freeze until -60C). You must NEVER do this in the case of a Smart in cold temperatures. If Siberia-level -60C temperatures are possible, keep the battery warm with a plumbing-type heater strip. But otherwise it will be OK.
And so (hopefully I'm wrong) the HV battery in your Smart ED is probably ruined. Unless the car is on warranty and you can cajole them to honor the warranty, this usually means the car is a write-off.
You are not to blame for this sorry situation - it is the way Mercedes Benz's treats the consumer like an idiot and does not provide the technical information needed for an owner who has never owned an EV to understand how the car must be cared for in all kinds of situations the MB engineers might not have thought about.(especially in a climate far colder than Stuttgart).
(But I'm still hoping a big "neverrrmind!" will be on order regarding this dire post.)
Last edited by Yinzer; 03-28-2019 at 10:15 AM.