Origin: Mainland China Customization: No R/C Function: With Interchange Part Number: key remote for Manufacturer Part Number: key remote for Other Part Number: key remote for Material Type: ABS plastic Country/Region of Car Manufacture: China Frequency: 433MHz / 315MHz Blade: YES Chip: Yes (integrated) Condition: Color: Black Button: 2/3/4 Buttons Key Blank: Yes Electronics Board: Yes Fitment: For For BGA (2011-2014) W164, W166, W169, W172, W197, W201, W202, W203, W204, W207, W208, W209, W210, W211, W215, W216, W218, W220, W221, W230, W246, 463, 639 And other models with the same specifications of key blank and battery holder as listed below Important Note: Please check and make sure your remote is using the same transmitter and chip as our item before purchasing. (1) You need to program the key at a local qualified automotive locksmith before using. (2) The key has two kinds of frequency: 315MHz / 433MHz. Please select the correct one for your car. (3) It is recommended to use an MB IR code reader to read and write the key. Note: Please disregard the frequency marking on the key shell. We will set the frequency according to your order. How do I know my key's frequency? Usually, you can find the frequency on the battery holder or under the battery cover. Package Includes: 1 x Remote Car Key