The addition of Mercedes-Benz to the list of car manufacturers supporting Apple's Car Key feature will likely increase the appeal of Apple's products to potential car buyers. This could lead to increased sales of iPhones and Apple Watches, positively impacting Apple's stock price in the short term.

By offering support for Apple's Car Key feature, Mercedes-Benz is likely to attract more customers who are interested in the convenience and security of using their iPhone or Apple Watch as a car key. This could lead to increased sales of Mercedes-Benz vehicles, positively impacting the company's stock price in the short term.

By offering support for Apple's Car Key feature, Mercedes-Benz is likely to attract more customers who are interested in the convenience and security of using their iPhone or Apple Watch as a car key. This could lead to increased sales of Mercedes-Benz vehicles, positively impacting the company's stock price in the short term.