【NOTICE】 This is just a key shell case, there is no interior(remote board,electronics,transponder chip) inside. Ensure your key is exactly same as ours(the same shape,buttons)then it will work|【Fit For】 FCC ID: IYZ3312. The key shell case is fits for Mercedes-Benz C230 C280 C350 C43 AMG C55 AMG CL500 CL600 CLK320 CLK430 CLK500 CLK55 AMG CLS500 E320 E350 E500 G500|【HOW TO USE】You can easily move the internal components from your old remote to this new replacement smart key case, just cut the key blade, take out the internal electronic products including the battery and chip from the key and replace them into our key shell, then you can start to use|【PREMINUM QUALITY】 Each key case is made of durable materials, providing excellent impact resistance. It effectively protects the internal electronic components, offers comfortable handing, and has excellent wear resistance and durability, good replacement for broken or worn key|【SPECIFICATION】 4 Buttons (Lock, Unlock, Trunk, Panic). The product is an aftermarket item without logo and part number on the back. NOTE: Please confirm your remote key has the exactly same buttons before purchasing