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100% same here. Doing CCS upgrade, explored service mode, found low coolant alarm in service mode only, found A210 valve calibration fault in service mode. Car is M3LR RWD built early 04/2018. I pulled every cover off to check all coolant lines for leaks, every coolant line was perfectly dry...

Wow that's a pain to attach a picture using a mobile device. Screenshot from scanmytesla. I've been watching my SOC (%state of charge) vs. "SoC expected" lately. If I keep the car awake, the numbers track together as the battery depletes. If I let the car do a long 3hr+ deep sleep the...

I set 90% on the car, and the mobile app agrees it was at 90%. I haven't checked what what the car charges to immediately when done charging vs. done charging & after a long deep sleep. If those read different remaining miles it might mean the BMS is still adjusting. Will have to wait until...

After 2 months and ~2,000 miles the range has improved from 283 at it's low, to now 295-300. (2018 LR RWD, 60k miles). No big jumps, just increases by a couple miles here and there. Just following the 6 steps above when time allows. Just taking car on trips when needed. No big 0-100%...

For M3/MY cars with significant range loss (>10% loss), check what your battery voltage is at low state of charge. Your missing range might be there, indicating BMS calibration is at fault for lower indicated range. Kudos to the to OP for zeroing in on the real cause of massive missing range...