MB Fbs3 BGA Keyless Go Smart Remote Key 433/315MHz for Mercedes Benz W221 W216 W164 W251 for Xhorse Vvdi MB BGA Tool, Benz Key, Benz

Frequency: 433/315MHz
connection by USB for data read and write
write by IR vehicle coverage:
for Mercedes with FBS3 after year 2019: 

As long as you can read the Ignition Switch's data and collect the correct password, the key can match the same function as the OEM keyless go.
S-W221(2010-2013)
GL-W164(2010-2012)
ML-W164(2010-2012)
R-W251(2010-2017)

S series W221 W216: YES!
ML/G/R sries W164 W251: YES!
2010-2014 C & E series: NO!
Compatible with VVDI MB tool

Note:
 The key does not come with battery. 
 The key can be used once only. Can not be reused. 
 The key can be programmed as normal key.