Hello all, took delivery of my blue M3 Performance on 26 Dec, best Christmas present ever. But 3 weeks in, it alerts me that it is time for first software update, and over night my 90% range dropped to 263 from 279 (it was fully charged and plugged in when software installed).
Tried charging it up to 100% and that dropped from 310 to 294.
Contacted Tesla, at first they told me the battery range will decrease as I drive it, and I need to plug it in to recharge it (really?), finally when I showed them before and after screen shots and explained again it lost 16 miles of max range while parked with software download they said this:
“Currently there has been a firmware bug that was introduced in our previous firmware release that is causing range inaccuracy. Our Firmware Team is reviewing this concern and is working on a fix to be released ASAP. There will be no need to come in as this issue can be resolved over the air.”
Well, got another software update couple of days ago and it didn’t fix anything. Mechanic even disconnected battery when he was out to fix hood and another problem last week, no luck.
It is not cold on central coast (65 deg average) and car is parked in garage.