Highlights of Xhorse MB FBS3 BGA KeylessGo Key
1. Work on W204 W207 W212 W164 W166 W221
2. Support exchange frequence 433/315mhz
3. Keyless entry + Push Button Start
4. No need battery insertion for writing data by infrared
5. Stable & Reliable
Support exchange frequence between 433Mhz / 315Mhz
Method 1:
If you have VVDI MB Tool, it is easy to change frequency in vvdi mb software (update software to latest version)
Select Other Function-> Set key remote frequency/ Update MB smart key
You can set frequency between 315MHz and 433MHz


Method 2:
If without VVDI MB, you can change FBS3 keylessgo smart key frequency manually by soldering / desoldering the FRE resistor (marked red in picture below)

