If your card slot on the Mercedes is a micro, then yes, it will fit. If the Mercedes card slot is standard size, then no, it will not fit. This is a micro sd card, with an adapter to fit the standard size card. The actual micro card is about the size of your pinky finger nail. 

EVO Select 256GB MicroSDXC, works as well, gives me 10 hrs of recording time. 

Yes, you can remove the micro SD from the adapter and use it in the switch 

FD-EOS fit for Canon FD mount lens and canon EF mount camera body. canon 60d is EF mount, so the adapter ring can work with your camera, but you need to check your lens mount. could you pls let us know your lens specific model? service(AT)kentfaith(DO NOT)com, Please note: It is not same between Canon FD mount and EF mount, this adapter ring is only for Canon FD mount lens, please contact us if you want to purchase for Canon EF mount lens. 

The adapter is used to allow the micro SD to be used in devices that take a regular SD card like a laptop.