CGDI Mercedes Benz Chrome Remote 3 Buttons Fobik / IYZ-3312 / 315MHz or 433MHz

The IYZ‑3312 FCC ID covers both 315 MHz and 433 MHz versions depending on region and vehicle; many aftermarket CGDI fobs are made to support either and can be programmed to your car with a suitable tool (e.g., CGDI MB programmer).

315 MHz is typically used for North American‑specced vehicles, and 433 MHz for GCC/Europe.

These fobs generally require programming to your specific Mercedes (cutting blade + syncing code).

Confirm compatibility with your exact model/year before purchase, as appearance and button mapping varies.