Actually mb are quite considerate when it comes to swapping EV’s due to its range, you’ll need to advise them of the difficulties you’re experiencing such as having to make frequent charging stops to get to your destination and the impact its having on your health/mobility.
In my case, my work was located 100+ miles away from home, and my then E2008 was a pita in winter/cold months. A swap was approved considering I mostly work from home, and in the event I couldn’t cope with the vehicle anymore. I didn’t swap in the end.