Absolutely locate any nearby MB dealer in FL and go in to have them plug in the car and read the error codes. There is at least one technician at each MB dealer that is trained on our B250s. I suspect the warranty on your 2014 is over but the evaluation should not cost a lot.
It is hopefully a software gliche or bad sensor. These are easy and cheap fixes. I get error messages from time to time in my 2017 and a restart reboots everything to normal. Have them ensure that the latest software updates are installed, including the recall software upgrade back in the day. I forget when it was.
It is less likely but possible this is worse but let them figure it out. Despite the posts, it is rare for the Tesla motor to fail. You want to check this out because the car can shut itself down even if you are driving at speed as happened to one of our members. If your motor starts to whine, you have trouble. But again, with your mileage, this is not likely unless you are the unlucky one that has a bad motor. By the way, do you know when your car was produced in 2014? I thought the early ones had the most trouble with their Tesla motor.
Good luck. Stay safe.
Jeff in NYC
MB '06 E500W; MB '81 380SL
Retired: MB '17 B250e; MB '14 Be