As Stealth said the coding assume you're (somewhat) responsible and don't do stupid things.
By just using the coding function it is unlikely you'll "brick" the car but you can disable some
safety features which have been put in place for a good reason.
If you would use e-sys to actually update the FW for modules there's a higher likehood for you to actually brick the individual module or leave the car inoperable (hence this particular procedure is not documented for general use).
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