I have not found one, but it is incredibly similar to the G7 ThinQ, for which teardown videos are abundant. Just did my first one with no guide with success only because of having done G7. Battery is 10/10 difficulty to remove. Required 99% alcohol, a little heat from screen side, and constant gentle pressure. Be very careful with the battery.

Don’t waste your time pulling the switch and cleaning it. Even when that works it is generally temporary. Replace the part. Also, as far as diagnosing which door, is the key in dinger also going off? If yes, drivers door. If no, any other door, but usually passenger front. It is not an issue with dirty contacts, but rather a plunger that gets sticky.