Consider a non-combat cantrip. You are a fighter and generally have a more optimal solution in combat using your class features.
Maybe something that fits the theme of your class: Mage hand - fits the echo knight theme of making a spectral hand to grab light things or pull levers. Minor illusion - more illusions and distractions, or mock up a battlefield diagram to share your plan. Message - battlefield commander ability to silently share plans before an attack Mending - maintain your own gear Prestidigitation - cleanup after battle, cool your undershirt on a hot day in armor, warm your coffee at night, start the campfire, show people a palm sized replica of your target/enemy.
Pick something that encourages roleplay out of combat. Give yourself some reason to engage in the downtime action between fights. It will hopefully give you a richer experience.
Except in the article here, they are counting on a driver connecting their phone to the wifi and logging in with Tesla credentials.
In this instance you don’t need to disable anything in the car.