Please refer to the installation guide in the second product image.(Includes opening/prying tool + Installation Video)
Original OEM Battery as Provided by Manufacturer : Same batteries as provided by OEM original manufacturer in All 1995-2015 black or chrome-sided (2, 3 or 4 button) smart key remotes
TESTED AND WORKS IN THE FOLLOWING REMOTES: A-Class (W176) - (13-18) / B-Class (W246) - (12-18) / C-Class (W204/S204/W205/S205/C205/A205) - (12-18) / E-Class (W212/S212/C207/A207) (10-16) / S-Class (W221/W222/C217/A217) - (010-17) / G-Class (W463) - (13-18) / M-Class (W166) - (12-16) / Class (W447) - (15-18) / CLA (C117) - (14-19) / CLS (W218) - (12-18)
Easy to Install:It only takes a few minutes and there is no need to schedule a battery replacement service or reprogram the remote.(Includes opening/prying tool to open the remote and remove the batteries without damaging the remote case )