New 4 Buttons Remote Key Case Shell for Mercedes-Benz CL55 AMG C230 C240 S600 E320 4Buttons(lock unlock trunk and panic) Each item have been tested before ship This is just a key cover shell, there is no interior(remote/electronics/transponder chips) inside If you have a worn and broken key blank /remote case, all you need to do is remove the internal component from your old remote and put it in this case Package include:1 x 4Buttons smart key shell for Mercedes-Benz/1 x cross screwdriver