1 key blank. This key does not has chip inside. can not programmed. for Mercedes Benz W107 W124 W126 W129 W140 E S SE SL SLC SEL SEC 230 300 photo is showing both side of the key. actual photo to show how different on each side. please compare with your own original one. recheck by the head and groove side and shape. If it does not match the same. please don't purchase. some car models may use different key. please make decision by the photo.