You need to check and confirm this information before you place an order (make sure your OEM key's buttons and shape are the same as ours):
This Item Only Work for Below Part number and Model: 
FCC ID: IYZ-3312
Test Key:  HU64
Frequency: 315MHz
Chip:  NEC & BGA
Battery: CR2032
Buttons: 4
Aftermarket Emergency Key Included.

Compatible with:  
 Mercedes 1997 - 2014

It is an aftermarket key without a logo or part number printed, and this transmitter only work on vehicles equipped with support push start / Keyless entry.  

Important Note:
1. If your original key has the same shape and button it will fit.
2.This remote will have to go to a qualified locksmith for programming.
3. You will need to get the blade cut at the local dealer or professional locksmith .

Thank you for selecting our service!