Specifications:Best replacement for a key with broken buttons or worn key case.Key case only, has no electronic internals, this is an aftermarket replacement case.Take the internal electronics(include immobilizer or transponder chip) from original remote.Get blades cut by local locksmith or dealer or swap the blades with your original. Type: Car Key ShellMaterial: ABS and CopperButton: 1 ButtonFeatures: Durable, Wear-resistant, Anti-ScratchFitment: for Mercedes B-enz W168, W124, W202 1984-2004, for A, C, E, Smart For Two Notes:Please compare with pictures before purchase, make sure your key is exactly as same as pic shows.This is just a remote key shell case replacement, there is no interior unit(remote or electronics or transponder chip) inside.Due to the light and screen setting difference, the items color may be slightly different from the pictures. Package Includes:1 x Car Key Shell