TOFNK New Replacement Flip Key Remote Fob Case For Mercedes Benz Switchblade 4 Button Make sure your current key looks IDENTICAL with the gallery pictures shown. ONLY SHELL PART, NO interior (remote/electronics/transponder chips) unit inside. Pay very close attention to the blade type. Be sure your blade has the 2 notches towards the bottom. THIS DOES NOT COME WITH THE INFRARED WINDOW AT THE TOP OF THE CASE. PLEASE BE SURE YOUR ORIGINAL DOES NOT INCLUDE THIS FEATURE!! Shipped By Amazon