Here listed is a new replacement outer shell/case to replace your worn or broken case shell. 
You can easily move the internal components from your old case to this new replacement shell.
NO interior (remote/electronics/transponder chips/battery) unit inside
Compatible:
for BMW for Mercedes-Benz for Buick for Audi for Cadillac for Lexus and all other smart models with one-key start function,
Suitable for all original cars with one-key start function, not suitable for all manual direct-plug car keys.
 
Specifications:
No Programming Necessary.