XHORSE VVDI Universal For Mercedes Benz FBS3 Smart Key 433/315 Mhz
Xhorse VVDI MB Universal for Benz FBS3 KeylessGo Smart key
W204 W207 W212 W164 W166 W221 Keyless entry + Push button start
No need battery insertion for wirting data by infrared
Support exchange frequence 433/315MHz
Can be renewed
Stable quality
compatible with multi for Benz key programmers
With free 200 bonus points (can be exchanged to 1 token )
Can be used on these for Mercedes Benz chassis:
W221- S series, W216- S series, W164 ML series, W164 GL series, W251- R series, W166- ML series, W212- E series, W207 C series, W204- X series.
Addition: W251 and W164 belong to the same kind, W216 and W221 belong to the same kind, W212, W207, W204 belong to the same kind.
How to exchange FBS3 smart key frequency between 315MHz and 433MH?
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)
