Who uses coin change anymore? It is Apple wallet, Venmo and PayPal. Lol.
By ur post, it got me thinking that you serendipitously discovered a new theft prevention mechanism better than the Club steering wheel lock for Kia/Hyundai automobiles. How long did it take the technician to discover the nickel? U already mention u spoke with the service advisor but there was no resolution except for a flat bed tow to the dealership. Security is about frustrating would be thieves.
Making lemonade out of a lemon situation.