Origin:Mainland China Customization:No R/C Function:With Interchange Part Number:key remote for BENZ Manufacturer Part Number:key remote for BENZ Other Part Number:key remote for BENZ Material Type:abs plastic Country/Region of Car Manufacture:china Frequency:433MHz/315MHz Blade:YES Chip:Yes(integrated) Condition: 100% Brand New Color: Black Button:2/3/4 Buttons Key Blank: Yes Frequency:315Mhz / 433MHZ Electronics Board: Yes Fitment: For Mercedes For Benz BGA(2011-2014) W164.W166.W169.W172.W197.W201.W202.W203.W204.W207.W208.W209.W210.W211.W201.W215.W216.W218.W220.W221.W230.W246.463.639 And other model with the same specifications of key blank and battery holder listed as below section... ImportantNote: Please Check and make sure your remote is using the same transmitter and chip as Our items before buying. (1). You need to program the key at local qualified automotive locksmith before using. (2). The key has 2 kinds of frequency, 315/433MHz. Please select a correct one for your car. (3). Propose you use MB IR code reader to read and write the key. Note - please disregard the frequency marking on key shell. We'll set frequency according to your order. How do I know my key's frequency? usually you can find the frequency on battery holder or under battery cover. Package Includes: 1 X Remote Car Key 1. We ship to Worldwide. 2. We ship your orders within 1-5 business days after the payment cleared. 3. Deivery time depends on destination and other factors, it may takes up to 30 days. If you don't receive the item after30 days,Please contact us, we'll investigate and solve the delivery problem. Contact us by message if there is any questions or problems with the product, we will do our best to find the answer and solve the problem for you. We respect each customer and hope we could be treated the same. :)