Hi, good concern.
I have a Tesla Model S85 which recently has suffered from leakage and isolation failure and it's just now at the garage rebuilding motor stator and doing coolant delete. I have also a MB 250e that is going to go to the same garage at the moment I get the Tesla back for doing the coolant delete.
I live in Spain... Coolant delete and dissasembly/reassembly motor to change bearings (I suffer also from milling noise in the MB) is about 2K €. But if no preventive coolant delete is done and MB motor fails it is better to throw away the car because a reman motor at MB is about 15k €
