Both CG MB FBS3 BGA KeylessGo Key and Xhorse VVDI Benz smart key shell 3 button share the same assembly process.

1. Open the battery cover and install the battery.

1. Put into the pcb motherboard of CG MB FBS3 BGA KeylessGo Key.

1. Close the back cover.

1. Buckle the metal edge.

1. Match the key and test whether the key works. Press the remote control button to see if the light is on.

1. Install the small key clip and spring.

1. Fit the tail.

1. Buckle the plastic card.

1. Install the small key.

1. The key is assembled and can be used normally.

FBS3 Benz Keyless go

Advanced Quality, High-Class Features

CG Benz Keyless go: CGYS040001

Support cars models:

W221-S series

W216-S series

W164-ML series

W251-R series

W166-ML series

W164-GL series

207 C Series

204 C Series

212 E series

https://www.obdexpress.co.uk/wholesale/mb-fbs3-bga-keylessgo-key-315mhz.html

Source:http://blog.obdexpress.co.uk/2020/06/16/fbs3-bga-keylessgo-key-vvdi-benz-smart-key-shell-assembly-process/