The BMW and Mercedes Benz keys have speical anti-copy chip,and belong to our own intellectual property rights. All keys are made in strict accordance with international standards. So you can get rid of the key shortage and no need to use any renovated second-hand keys.

The coverage list for the keys:

S Class: W140.W220; CL Class: W215; SL Class: W203; E Class: W211;CLK Class: W208,W209; CLS Class: W219;
C class: W202.W203;ML Class: W163; V Class: W639

Supported Frequency: 433 and 315 MHZ